113861556 has 36 divisors (see below), whose sum is σ = 290620512. Its totient is φ = 37584144.

The previous prime is 113861533. The next prime is 113861557. The reversal of 113861556 is 655168311.

113861556 is a `hidden beast` number, since 1 + 1 + 38 + 615 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×113861556² = 25928907869482272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 113861556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113861557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11646 + ... + 19061.

It is an arithmetic number, because the mean of its divisors is an integer number (8072792).

Almost surely, 2^113861556 is an apocalyptic number.

It is an amenable number.

113861556 is an abundant number, since it is smaller than the sum of its proper divisors (176758956).

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

113861556 is a wasteful number, since it uses less digits than its factorization.

113861556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30820 (or 30815 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 113861556 is about 10670.5930481862. The cubic root of 113861556 is about 484.6843959398.

The spelling of 113861556 in words is "one hundred thirteen million, eight hundred sixty-one thousand, five hundred fifty-six".