113131404 has 30 divisors (see below), whose sum is σ = 295748684. Its totient is φ = 37710360.

The previous prime is 113131399. The next prime is 113131429. The reversal of 113131404 is 404131311.

It is a super-2 number, since 2×113131404² = 25597429142022432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 174262 + ... + 174909.

Almost surely, 2^113131404 is an apocalyptic number.

It is an amenable number.

113131404 is an abundant number, since it is smaller than the sum of its proper divisors (182617280).

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

113131404 is a wasteful number, since it uses less digits than its factorization.

113131404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349187 (or 349176 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 113131404 is about 10636.3247411876. The cubic root of 113131404 is about 483.6461395922.

Adding to 113131404 its reverse (404131311), we get a palindrome (517262715).

The spelling of 113131404 in words is "one hundred thirteen million, one hundred thirty-one thousand, four hundred four".