131310442 has 4 divisors (see below), whose sum is σ = 196965666. Its totient is φ = 65655220.

The previous prime is 131310437. The next prime is 131310461. The reversal of 131310442 is 244013131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244013131 = 151 ⋅1615981.

It can be written as a sum of positive squares in only one way, i.e., 123010281 + 8300161 = 11091^2 + 2881^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32827609 + ... + 32827612.

Almost surely, 2^131310442 is an apocalyptic number.

131310442 is a deficient number, since it is larger than the sum of its proper divisors (65655224).

131310442 is an equidigital number, since it uses as much as digits as its factorization.

131310442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65655223.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 131310442 is about 11459.0768389081. The cubic root of 131310442 is about 508.2761766307.

Adding to 131310442 its reverse (244013131), we get a palindrome (375323573).

The spelling of 131310442 in words is "one hundred thirty-one million, three hundred ten thousand, four hundred forty-two".