131013203231 has 4 divisors (see below), whose sum is σ = 137908635000. Its totient is φ = 124117771464.

The previous prime is 131013203219. The next prime is 131013203239. The reversal of 131013203231 is 132302310131.

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

It is a cyclic number.

It is not a de Polignac number, because 131013203231 - 2¹⁴ = 131013186847 is a prime.

It is a super-2 number, since 2×131013203231² (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 (131013203239) 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, 3447715856 + ... + 3447715893.

It is an arithmetic number, because the mean of its divisors is an integer number (34477158750).

Almost surely, 2^131013203231 is an apocalyptic number.

131013203231 is a deficient number, since it is larger than the sum of its proper divisors (6895431769).

131013203231 is an equidigital number, since it uses as much as digits as its factorization.

131013203231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6895431768.

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

Adding to 131013203231 its reverse (132302310131), we get a palindrome (263315513362).

The spelling of 131013203231 in words is "one hundred thirty-one billion, thirteen million, two hundred three thousand, two hundred thirty-one".