131431396 has 6 divisors (see below), whose sum is σ = 230004950. Its totient is φ = 65715696.

The previous prime is 131431367. The next prime is 131431397. The reversal of 131431396 is 693134131.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 8100 = 11464^2 + 90^2 .

It is not an unprimeable number, because it can be changed into a prime (131431397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16428921 + ... + 16428928.

Almost surely, 2^131431396 is an apocalyptic number.

It is an amenable number.

131431396 is a deficient number, since it is larger than the sum of its proper divisors (98573554).

131431396 is a wasteful number, since it uses less digits than its factorization.

131431396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32857853 (or 32857851 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 131431396 is about 11464.3532743893. The cubic root of 131431396 is about 508.4321915649.

The spelling of 131431396 in words is "one hundred thirty-one million, four hundred thirty-one thousand, three hundred ninety-six".