131323131 has 24 divisors (see below), whose sum is σ = 193823760. Its totient is φ = 85660416.

The previous prime is 131323111. The next prime is 131323141.

It is a happy number.

131323131 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 131323131 - 2⁶ = 131323067 is a prime.

It is a super-2 number, since 2×131323131² = 34491529471286322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131323111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89280 + ... + 90738.

It is an arithmetic number, because the mean of its divisors is an integer number (8075990).

Almost surely, 2^131323131 is an apocalyptic number.

131323131 is a deficient number, since it is larger than the sum of its proper divisors (62500629).

131323131 is a wasteful number, since it uses less digits than its factorization.

131323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1672 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 131323131 is about 11459.6304914251. The cubic root of 131323131 is about 508.2925482880.

The spelling of 131323131 in words is "one hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-one".