113172531 has 8 divisors (see below), whose sum is σ = 158838720. Its totient is φ = 71477352.

The previous prime is 113172523. The next prime is 113172533. The reversal of 113172531 is 135271311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 113172531 - 2³ = 113172523 is a prime.

It is a super-2 number, since 2×113172531² = 25616043545891922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (113172533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992685 + ... + 992798.

It is an arithmetic number, because the mean of its divisors is an integer number (19854840).

Almost surely, 2^113172531 is an apocalyptic number.

113172531 is a deficient number, since it is larger than the sum of its proper divisors (45666189).

113172531 is a wasteful number, since it uses less digits than its factorization.

113172531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985505.

The product of its digits is 630, while the sum is 24.

The square root of 113172531 is about 10638.2578930951. The cubic root of 113172531 is about 483.7047396043.

The spelling of 113172531 in words is "one hundred thirteen million, one hundred seventy-two thousand, five hundred thirty-one".