131257534 has 16 divisors (see below), whose sum is σ = 203575680. Its totient is φ = 63406080.

The previous prime is 131257531. The next prime is 131257549. The reversal of 131257534 is 435752131.

It is a happy number.

It is a super-2 number, since 2×131257534² = 34457080463522312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 131257496 and 131257505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131257531) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 46302 + ... + 49054.

It is an arithmetic number, because the mean of its divisors is an integer number (12723480).

Almost surely, 2^131257534 is an apocalyptic number.

131257534 is a deficient number, since it is larger than the sum of its proper divisors (72318146).

131257534 is a wasteful number, since it uses less digits than its factorization.

131257534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3555.

The product of its digits is 12600, while the sum is 31.

The square root of 131257534 is about 11456.7680433882. The cubic root of 131257534 is about 508.2079020692.

The spelling of 131257534 in words is "one hundred thirty-one million, two hundred fifty-seven thousand, five hundred thirty-four".