118133631 has 36 divisors (see below), whose sum is σ = 214368336. Its totient is φ = 61364160.

The previous prime is 118133627. The next prime is 118133633. The reversal of 118133631 is 136331811.

118133631 is a `hidden beast` number, since 1 + 18 + 13 + 3 + 631 = 666.

It is not a de Polignac number, because 118133631 - 2² = 118133627 is a prime.

It is a super-2 number, since 2×118133631² = 27911109546488322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 118133595 and 118133604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118133633) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 126 + ... + 15371.

It is an arithmetic number, because the mean of its divisors is an integer number (5954676).

Almost surely, 2^118133631 is an apocalyptic number.

118133631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

118133631 is a deficient number, since it is larger than the sum of its proper divisors (96234705).

118133631 is a wasteful number, since it uses less digits than its factorization.

118133631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15532 (or 15518 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 118133631 is about 10868.9296161122. The cubic root of 118133631 is about 490.6718965328.

The spelling of 118133631 in words is "one hundred eighteen million, one hundred thirty-three thousand, six hundred thirty-one".