117257531 has 16 divisors (see below), whose sum is σ = 128117760. Its totient is φ = 106907040.

The previous prime is 117257521. The next prime is 117257533. The reversal of 117257531 is 135752711.

It is a cyclic number.

It is not a de Polignac number, because 117257531 - 2⁶ = 117257467 is a prime.

It is a super-2 number, since 2×117257531² = 27498657152431922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117257533) 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, 133265 + ... + 134141.

It is an arithmetic number, because the mean of its divisors is an integer number (8007360).

Almost surely, 2^117257531 is an apocalyptic number.

117257531 is a deficient number, since it is larger than the sum of its proper divisors (10860229).

117257531 is a wasteful number, since it uses less digits than its factorization.

117257531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its digits is 7350, while the sum is 32.

The square root of 117257531 is about 10828.5516575394. The cubic root of 117257531 is about 489.4559155909.

The spelling of 117257531 in words is "one hundred seventeen million, two hundred fifty-seven thousand, five hundred thirty-one".