15556113 has 6 divisors (see below), whose sum is σ = 22469954. Its totient is φ = 10370736.

The previous prime is 15556111. The next prime is 15556157. The reversal of 15556113 is 31165551.

It can be written as a sum of positive squares in only one way, i.e., 15116544 + 439569 = 3888^2 + 663^2 .

It is not a de Polignac number, because 15556113 - 2¹ = 15556111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15556111) 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 5 ways as a sum of consecutive naturals, for example, 864220 + ... + 864237.

Almost surely, 2^15556113 is an apocalyptic number.

It is an amenable number.

15556113 is a deficient number, since it is larger than the sum of its proper divisors (6913841).

15556113 is a wasteful number, since it uses less digits than its factorization.

15556113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728463 (or 1728460 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 15556113 is about 3944.1238570816. The cubic root of 15556113 is about 249.6320614171.

The spelling of 15556113 in words is "fifteen million, five hundred fifty-six thousand, one hundred thirteen".