131023013231 has 32 divisors (see below), whose sum is σ = 148880047680. Its totient is φ = 114215270400.

The previous prime is 131023013201. The next prime is 131023013249. The reversal of 131023013231 is 132310320131.

It is not a de Polignac number, because 131023013231 - 2¹⁴ = 131022996847 is a prime.

It is a super-2 number, since 2×131023013231² (a number of 23 digits) 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 (131023013201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73731815 + ... + 73733591.

It is an arithmetic number, because the mean of its divisors is an integer number (4652501490).

Almost surely, 2^131023013231 is an apocalyptic number.

131023013231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131023013231 is a deficient number, since it is larger than the sum of its proper divisors (17857034449).

131023013231 is a wasteful number, since it uses less digits than its factorization.

131023013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131023013231 its reverse (132310320131), we get a palindrome (263333333362).

The spelling of 131023013231 in words is "one hundred thirty-one billion, twenty-three million, thirteen thousand, two hundred thirty-one".