113217551865 has 48 divisors (see below), whose sum is σ = 223392124800. Its totient is φ = 52506685440.

The previous prime is 113217551857. The next prime is 113217551873. The reversal of 113217551865 is 568155712311.

113217551865 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 1 + 75 + 518 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (113217551857) and next prime (113217551873).

It is not a de Polignac number, because 113217551865 - 2³ = 113217551857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 113217551865.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4960840 + ... + 4983609.

It is an arithmetic number, because the mean of its divisors is an integer number (4654002600).

Almost surely, 2^113217551865 is an apocalyptic number.

113217551865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113217551865 is a deficient number, since it is larger than the sum of its proper divisors (110174572935).

113217551865 is a wasteful number, since it uses less digits than its factorization.

113217551865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9944494 (or 9944491 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The spelling of 113217551865 in words is "one hundred thirteen billion, two hundred seventeen million, five hundred fifty-one thousand, eight hundred sixty-five".