131520532 has 72 divisors (see below), whose sum is σ = 284074560. Its totient is φ = 52715520.

The previous prime is 131520491. The next prime is 131520553. The reversal of 131520532 is 235025131.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 170644 + ... + 171412.

It is an arithmetic number, because the mean of its divisors is an integer number (3945480).

Almost surely, 2^131520532 is an apocalyptic number.

It is an amenable number.

131520532 is an abundant number, since it is smaller than the sum of its proper divisors (152554028).

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

131520532 is a wasteful number, since it uses less digits than its factorization.

131520532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 818 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 131520532 is about 11468.2401439802. The cubic root of 131520532 is about 508.5471041654.

Adding to 131520532 its reverse (235025131), we get a palindrome (366545663).

It can be divided in two parts, 13 and 1520532, that multiplied together give a square (19766916 = 4446²).

The spelling of 131520532 in words is "one hundred thirty-one million, five hundred twenty thousand, five hundred thirty-two".