Base | Representation |
---|---|
bin | 101001000110… |
… | …1110011011001 |
3 | 1111112222021000 |
4 | 1102031303121 |
5 | 21004133340 |
6 | 2045535213 |
7 | 351122553 |
oct | 122156331 |
9 | 44488230 |
10 | 21552345 |
11 | 11190661 |
12 | 7274509 |
13 | 4607b89 |
14 | 2c104d3 |
15 | 1d5ad30 |
hex | 148dcd9 |
21552345 has 32 divisors (see below), whose sum is σ = 40573440. Its totient is φ = 10817280.
The previous prime is 21552341. The next prime is 21552353. The reversal of 21552345 is 54325512.
It is a happy number.
It is not a de Polignac number, because 21552345 - 22 = 21552341 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is not an unprimeable number, because it can be changed into a prime (21552341) 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 in 31 ways as a sum of consecutive naturals, for example, 2401 + ... + 6990.
It is an arithmetic number, because the mean of its divisors is an integer number (1267920).
Almost surely, 221552345 is an apocalyptic number.
It is an amenable number.
21552345 is a deficient number, since it is larger than the sum of its proper divisors (19021095).
21552345 is a wasteful number, since it uses less digits than its factorization.
21552345 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9422 (or 9416 counting only the distinct ones).
The product of its digits is 6000, while the sum is 27.
The square root of 21552345 is about 4642.4503228360. The cubic root of 21552345 is about 278.2903691038.
Adding to 21552345 its reverse (54325512), we get a palindrome (75877857).
The spelling of 21552345 in words is "twenty-one million, five hundred fifty-two thousand, three hundred forty-five".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.071 sec. • engine limits •