131323031031 has 4 divisors (see below), whose sum is σ = 175097374712. Its totient is φ = 87548687352.

The previous prime is 131323030981. The next prime is 131323031041. The reversal of 131323031031 is 130130323131.

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

It is not a de Polignac number, because 131323031031 - 2⁷ = 131323030903 is a prime.

It is a super-2 number, since 2×131323031031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131323030989 and 131323031007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131323031041) 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, 21887171836 + ... + 21887171841.

It is an arithmetic number, because the mean of its divisors is an integer number (43774343678).

Almost surely, 2^131323031031 is an apocalyptic number.

131323031031 is a deficient number, since it is larger than the sum of its proper divisors (43774343681).

131323031031 is an equidigital number, since it uses as much as digits as its factorization.

131323031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43774343680.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 131323031031 its reverse (130130323131), we get a palindrome (261453354162).

The spelling of 131323031031 in words is "one hundred thirty-one billion, three hundred twenty-three million, thirty-one thousand, thirty-one".