131031402 has 8 divisors (see below), whose sum is σ = 262062816. Its totient is φ = 43677132.

The previous prime is 131031379. The next prime is 131031409. The reversal of 131031402 is 204130131.

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

131031402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (131031409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10919278 + ... + 10919289.

It is an arithmetic number, because the mean of its divisors is an integer number (32757852).

Almost surely, 2^131031402 is an apocalyptic number.

131031402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131031402 is a wasteful number, since it uses less digits than its factorization.

131031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21838572.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131031402 is about 11446.8948628001. The cubic root of 131031402 is about 507.9158854882.

Adding to 131031402 its reverse (204130131), we get a palindrome (335161533).

The spelling of 131031402 in words is "one hundred thirty-one million, thirty-one thousand, four hundred two".