131878831 has 16 divisors (see below), whose sum is σ = 153773568. Its totient is φ = 110772000.

The previous prime is 131878823. The next prime is 131878853. The reversal of 131878831 is 138878131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 131878831 - 2³ = 131878823 is a prime.

It is a super-2 number, since 2×131878831² = 34784052131853122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131878801) 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 15 ways as a sum of consecutive naturals, for example, 71916 + ... + 73726.

It is an arithmetic number, because the mean of its divisors is an integer number (9610848).

Almost surely, 2^131878831 is an apocalyptic number.

131878831 is a deficient number, since it is larger than the sum of its proper divisors (21894737).

131878831 is a wasteful number, since it uses less digits than its factorization.

131878831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022.

The product of its digits is 32256, while the sum is 40.

The square root of 131878831 is about 11483.8508785163. The cubic root of 131878831 is about 509.0084939843.

The spelling of 131878831 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, eight hundred thirty-one".