131392544 has 12 divisors (see below), whose sum is σ = 258679134. Its totient is φ = 65696256.

The previous prime is 131392531. The next prime is 131392559. The reversal of 131392544 is 445293131.

It can be written as a sum of positive squares in only one way, i.e., 130416400 + 976144 = 11420^2 + 988^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 4106017 = 131392544 / (1 + 3 + 1 + 3 + 9 + 2 + 5 + 4 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 131392544.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2052977 + ... + 2053040.

Almost surely, 2^131392544 is an apocalyptic number.

It is an amenable number.

131392544 is a deficient number, since it is larger than the sum of its proper divisors (127286590).

131392544 is an equidigital number, since it uses as much as digits as its factorization.

131392544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106027 (or 4106019 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 131392544 is about 11462.6586793815. The cubic root of 131392544 is about 508.3820879751.

The spelling of 131392544 in words is "one hundred thirty-one million, three hundred ninety-two thousand, five hundred forty-four".