131520744 has 48 divisors (see below), whose sum is σ = 357739200. Its totient is φ = 43651104.

The previous prime is 131520709. The next prime is 131520751. The reversal of 131520744 is 447025131.

131520744 is a `hidden beast` number, since 131 + 520 + 7 + 4 + 4 = 666.

It is a super-2 number, since 2×131520744² = 34595412204627072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13387 + ... + 21029.

It is an arithmetic number, because the mean of its divisors is an integer number (7452900).

Almost surely, 2^131520744 is an apocalyptic number.

It is an amenable number.

131520744 is an abundant number, since it is smaller than the sum of its proper divisors (226218456).

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

131520744 is a wasteful number, since it uses less digits than its factorization.

131520744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7894 (or 7887 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 131520744 is about 11468.2493868942. The cubic root of 131520744 is about 508.5473774103.

Adding to 131520744 its reverse (447025131), we get a palindrome (578545875).

The spelling of 131520744 in words is "one hundred thirty-one million, five hundred twenty thousand, seven hundred forty-four".