15609056 has 12 divisors (see below), whose sum is σ = 30730392. Its totient is φ = 7804512.

The previous prime is 15609049. The next prime is 15609059. The reversal of 15609056 is 65090651.

15609056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15609056² = 487285258422272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 487783 = 15609056 / (1 + 5 + 6 + 0 + 9 + 0 + 5 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15609059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243860 + ... + 243923.

It is an arithmetic number, because the mean of its divisors is an integer number (2560866).

Almost surely, 2^15609056 is an apocalyptic number.

15609056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15609056 is a deficient number, since it is larger than the sum of its proper divisors (15121336).

15609056 is an equidigital number, since it uses as much as digits as its factorization.

15609056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487793 (or 487785 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 15609056 is about 3950.8297862601. The cubic root of 15609056 is about 249.9149363933.

The spelling of 15609056 in words is "fifteen million, six hundred nine thousand, fifty-six".