131631394 has 8 divisors (see below), whose sum is σ = 203816448. Its totient is φ = 63692580.

The previous prime is 131631389. The next prime is 131631403. The reversal of 131631394 is 493136131.

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

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 1061482 + ... + 1061605.

It is an arithmetic number, because the mean of its divisors is an integer number (25477056).

Almost surely, 2^131631394 is an apocalyptic number.

131631394 is a deficient number, since it is larger than the sum of its proper divisors (72185054).

131631394 is a wasteful number, since it uses less digits than its factorization.

131631394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123120.

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

The square root of 131631394 is about 11473.0725614371. The cubic root of 131631394 is about 508.6899531301.

The spelling of 131631394 in words is "one hundred thirty-one million, six hundred thirty-one thousand, three hundred ninety-four".