15233561 has 6 divisors (see below), whose sum is σ = 17720730. Its totient is φ = 13057296.

The previous prime is 15233531. The next prime is 15233563. The reversal of 15233561 is 16533251.

It can be written as a sum of positive squares in only one way, i.e., 11055625 + 4177936 = 3325^2 + 2044^2 .

It is not a de Polignac number, because 15233561 - 2¹⁴ = 15217177 is a prime.

It is a super-2 number, since 2×15233561² = 464122761481442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 15233561.

It is not an unprimeable number, because it can be changed into a prime (15233563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155396 + ... + 155493.

It is an arithmetic number, because the mean of its divisors is an integer number (2953455).

Almost surely, 2^15233561 is an apocalyptic number.

It is an amenable number.

15233561 is a deficient number, since it is larger than the sum of its proper divisors (2487169).

15233561 is an equidigital number, since it uses as much as digits as its factorization.

15233561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310903 (or 310896 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 15233561 is about 3903.0194721523. The cubic root of 15233561 is about 247.8946450259.

The spelling of 15233561 in words is "fifteen million, two hundred thirty-three thousand, five hundred sixty-one".