131751831 has 4 divisors (see below), whose sum is σ = 175669112. Its totient is φ = 87834552.

The previous prime is 131751817. The next prime is 131751839. The reversal of 131751831 is 138157131.

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

It is not a de Polignac number, because 131751831 - 2⁷ = 131751703 is a prime.

It is a super-2 number, since 2×131751831² = 34717089943705122, 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 (131751839) 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 3 ways as a sum of consecutive naturals, for example, 21958636 + ... + 21958641.

It is an arithmetic number, because the mean of its divisors is an integer number (43917278).

Almost surely, 2^131751831 is an apocalyptic number.

131751831 is a deficient number, since it is larger than the sum of its proper divisors (43917281).

131751831 is an equidigital number, since it uses as much as digits as its factorization.

131751831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43917280.

The product of its digits is 2520, while the sum is 30.

The square root of 131751831 is about 11478.3200425846. The cubic root of 131751831 is about 508.8450488981.

The spelling of 131751831 in words is "one hundred thirty-one million, seven hundred fifty-one thousand, eight hundred thirty-one".