131505328 has 20 divisors (see below), whose sum is σ = 256005688. Its totient is φ = 65439360.

The previous prime is 131505313. The next prime is 131505337. The reversal of 131505328 is 823505131.

It is a junction number, because it is equal to n+sod(n) for n = 131505296 and 131505305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16101 + ... + 22852.

Almost surely, 2^131505328 is an apocalyptic number.

It is an amenable number.

131505328 is a deficient number, since it is larger than the sum of its proper divisors (124500360).

131505328 is a wasteful number, since it uses less digits than its factorization.

131505328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39172 (or 39166 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 131505328 is about 11467.5772506663. The cubic root of 131505328 is about 508.5275071032.

The spelling of 131505328 in words is "one hundred thirty-one million, five hundred five thousand, three hundred twenty-eight".