15551056 has 20 divisors (see below), whose sum is σ = 31903092. Its totient is φ = 7318016.

The previous prime is 15551033. The next prime is 15551083. The reversal of 15551056 is 65015551.

It can be written as a sum of positive squares in 2 ways, for example, as 13808656 + 1742400 = 3716^2 + 1320^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 28315 + ... + 28858.

Almost surely, 2^15551056 is an apocalyptic number.

15551056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15551056 is an abundant number, since it is smaller than the sum of its proper divisors (16352036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15551056 is a wasteful number, since it uses less digits than its factorization.

15551056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57198 (or 57192 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 15551056 is about 3943.4827246991. The cubic root of 15551056 is about 249.6050082548.

The spelling of 15551056 in words is "fifteen million, five hundred fifty-one thousand, fifty-six".