131156638 has 8 divisors (see below), whose sum is σ = 202052232. Its totient is φ = 63805896.

The previous prime is 131156621. The next prime is 131156651. The reversal of 131156638 is 836651131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 886120 + ... + 886267.

It is an arithmetic number, because the mean of its divisors is an integer number (25256529).

Almost surely, 2^131156638 is an apocalyptic number.

131156638 is a deficient number, since it is larger than the sum of its proper divisors (70895594).

131156638 is a wasteful number, since it uses less digits than its factorization.

131156638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772426.

The product of its digits is 12960, while the sum is 34.

The square root of 131156638 is about 11452.3638607931. The cubic root of 131156638 is about 508.0776510353.

The spelling of 131156638 in words is "one hundred thirty-one million, one hundred fifty-six thousand, six hundred thirty-eight".