113133531 has 16 divisors (see below), whose sum is σ = 177054464. Its totient is φ = 62900064.

The previous prime is 113133529. The next prime is 113133533. The reversal of 113133531 is 135331311.

It is an interprime number because it is at equal distance from previous prime (113133529) and next prime (113133533).

It is not a de Polignac number, because 113133531 - 2¹ = 113133529 is a prime.

It is a super-2 number, since 2×113133531² = 25598391673055922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113133498 and 113133507.

It is not an unprimeable number, because it can be changed into a prime (113133533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72025 + ... + 73578.

It is an arithmetic number, because the mean of its divisors is an integer number (11065904).

Almost surely, 2^113133531 is an apocalyptic number.

113133531 is a deficient number, since it is larger than the sum of its proper divisors (63920933).

113133531 is a wasteful number, since it uses less digits than its factorization.

113133531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145650.

The product of its digits is 405, while the sum is 21.

The square root of 113133531 is about 10636.4247282628. The cubic root of 113133531 is about 483.6491706071.

Adding to 113133531 its reverse (135331311), we get a palindrome (248464842).

The spelling of 113133531 in words is "one hundred thirteen million, one hundred thirty-three thousand, five hundred thirty-one".