Base | Representation |
---|---|
bin | 100001000111110… |
… | …000011010001101 |
3 | 1102201121112121101 |
4 | 201013300122031 |
5 | 2114223301141 |
6 | 131050103101 |
7 | 16525133311 |
oct | 4107603215 |
9 | 1381545541 |
10 | 555681421 |
11 | 265738749 |
12 | 13611aa91 |
13 | 8b17c499 |
14 | 53b2bb41 |
15 | 33bb6531 |
hex | 211f068d |
555681421 has 2 divisors, whose sum is σ = 555681422. Its totient is φ = 555681420.
The previous prime is 555681419. The next prime is 555681461. The reversal of 555681421 is 124186555.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 496175625 + 59505796 = 22275^2 + 7714^2 .
It is a cyclic number.
It is not a de Polignac number, because 555681421 - 21 = 555681419 is a prime.
Together with 555681419, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (555681461) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277840710 + 277840711.
It is an arithmetic number, because the mean of its divisors is an integer number (277840711).
Almost surely, 2555681421 is an apocalyptic number.
It is an amenable number.
555681421 is a deficient number, since it is larger than the sum of its proper divisors (1).
555681421 is an equidigital number, since it uses as much as digits as its factorization.
555681421 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 48000, while the sum is 37.
The square root of 555681421 is about 23572.8958976194. The cubic root of 555681421 is about 822.1327689314.
The spelling of 555681421 in words is "five hundred fifty-five million, six hundred eighty-one thousand, four hundred twenty-one".
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