131310331 has 4 divisors (see below), whose sum is σ = 134513064. Its totient is φ = 128107600.

The previous prime is 131310323. The next prime is 131310337. The reversal of 131310331 is 133013131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133013131 = 139 ⋅956929.

It is a cyclic number.

It is not a de Polignac number, because 131310331 - 2³ = 131310323 is a prime.

It is a super-2 number, since 2×131310331² = 34484806054659122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131310337) 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, 1601305 + ... + 1601386.

It is an arithmetic number, because the mean of its divisors is an integer number (33628266).

Almost surely, 2^131310331 is an apocalyptic number.

131310331 is a deficient number, since it is larger than the sum of its proper divisors (3202733).

131310331 is an equidigital number, since it uses as much as digits as its factorization.

131310331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202732.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 131310331 is about 11459.0719955850. The cubic root of 131310331 is about 508.2760334111.

Adding to 131310331 its reverse (133013131), we get a palindrome (264323462).

The spelling of 131310331 in words is "one hundred thirty-one million, three hundred ten thousand, three hundred thirty-one".