131227904 has 18 divisors (see below), whose sum is σ = 261943710. Its totient is φ = 65613824.

The previous prime is 131227891. The next prime is 131227933. The reversal of 131227904 is 409722131.

It can be written as a sum of positive squares in only one way, i.e., 123654400 + 7573504 = 11120^2 + 2752^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256049 + ... + 256560.

Almost surely, 2^131227904 is an apocalyptic number.

It is an amenable number.

131227904 is a deficient number, since it is larger than the sum of its proper divisors (130715806).

131227904 is an frugal number, since it uses more digits than its factorization.

131227904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512625 (or 512611 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 131227904 is about 11455.4748482985. The cubic root of 131227904 is about 508.1696583385.

The spelling of 131227904 in words is "one hundred thirty-one million, two hundred twenty-seven thousand, nine hundred four".