Base | Representation |
---|---|
bin | 10110000111111000111… |
… | …110100111111001101101 |
3 | 12101100011100211120001000 |
4 | 112013320332213321231 |
5 | 144402033424341141 |
6 | 3122225542310513 |
7 | 214560316030521 |
oct | 26077076477155 |
9 | 5340140746030 |
10 | 1520300621421 |
11 | 53683508076a |
12 | 206789728439 |
13 | b0496178b2a |
14 | 53823847d81 |
15 | 2982e6e85b6 |
hex | 161f8fa7e6d |
1520300621421 has 8 divisors (see below), whose sum is σ = 2252297216960. Its totient is φ = 1013533747596.
The previous prime is 1520300621393. The next prime is 1520300621459. The reversal of 1520300621421 is 1241260030251.
1520300621421 is a `hidden beast` number, since 1 + 5 + 2 + 0 + 30 + 0 + 621 + 4 + 2 + 1 = 666.
It is not a de Polignac number, because 1520300621421 - 27 = 1520300621293 is a prime.
It is a super-2 number, since 2×15203006214212 (a number of 25 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 56307430423 = 1520300621421 / (1 + 5 + 2 + 0 + 3 + 0 + 0 + 6 + 2 + 1 + 4 + 2 + 1).
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1520300628421) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28153715185 + ... + 28153715238.
It is an arithmetic number, because the mean of its divisors is an integer number (281537152120).
Almost surely, 21520300621421 is an apocalyptic number.
It is an amenable number.
1520300621421 is a deficient number, since it is larger than the sum of its proper divisors (731996595539).
1520300621421 is an equidigital number, since it uses as much as digits as its factorization.
1520300621421 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 56307430432 (or 56307430426 counting only the distinct ones).
The product of its (nonzero) digits is 2880, while the sum is 27.
Adding to 1520300621421 its reverse (1241260030251), we get a palindrome (2761560651672).
The spelling of 1520300621421 in words is "one trillion, five hundred twenty billion, three hundred million, six hundred twenty-one thousand, four hundred twenty-one".
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