131031534 has 16 divisors (see below), whose sum is σ = 262389888. Its totient is φ = 43622712.

The previous prime is 131031517. The next prime is 131031557. The reversal of 131031534 is 435130131.

It is a self number, because there is not a number n which added to its sum of digits gives 131031534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8242 + ... + 18165.

It is an arithmetic number, because the mean of its divisors is an integer number (16399368).

Almost surely, 2^131031534 is an apocalyptic number.

131031534 is an abundant number, since it is smaller than the sum of its proper divisors (131358354).

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

131031534 is a wasteful number, since it uses less digits than its factorization.

131031534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27239.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 131031534 is about 11446.9006285544. The cubic root of 131031534 is about 507.9160560450.

Adding to 131031534 its reverse (435130131), we get a palindrome (566161665).

The spelling of 131031534 in words is "one hundred thirty-one million, thirty-one thousand, five hundred thirty-four".