131031402442 has 4 divisors (see below), whose sum is σ = 196547103666. Its totient is φ = 65515701220.

The previous prime is 131031402407. The next prime is 131031402473. The reversal of 131031402442 is 244204130131.

131031402442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 122345348841 + 8686053601 = 349779^2 + 93199^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32757850609 + ... + 32757850612.

Almost surely, 2^131031402442 is an apocalyptic number.

131031402442 is a deficient number, since it is larger than the sum of its proper divisors (65515701224).

131031402442 is an equidigital number, since it uses as much as digits as its factorization.

131031402442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65515701223.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 131031402442 its reverse (244204130131), we get a palindrome (375235532573).

The spelling of 131031402442 in words is "one hundred thirty-one billion, thirty-one million, four hundred two thousand, four hundred forty-two".