131320831 has 8 divisors (see below), whose sum is σ = 134361920. Its totient is φ = 128314368.

The previous prime is 131320817. The next prime is 131320841. The reversal of 131320831 is 138023131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131320831 - 2¹¹ = 131318783 is a prime.

It is a super-2 number, since 2×131320831² = 34490321309061122, 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 (131320811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906 + ... + 16231.

It is an arithmetic number, because the mean of its divisors is an integer number (16795240).

Almost surely, 2^131320831 is an apocalyptic number.

131320831 is a deficient number, since it is larger than the sum of its proper divisors (3041089).

131320831 is an equidigital number, since it uses as much as digits as its factorization.

131320831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17313.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 131320831 is about 11459.5301387099. The cubic root of 131320831 is about 508.2895808502.

Adding to 131320831 its reverse (138023131), we get a palindrome (269343962).

The spelling of 131320831 in words is "one hundred thirty-one million, three hundred twenty thousand, eight hundred thirty-one".