13231001505031 has 4 divisors (see below), whose sum is σ = 13319800173000. Its totient is φ = 13142202837064.

The previous prime is 13231001504947. The next prime is 13231001505041. The reversal of 13231001505031 is 13050510013231.

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 13231001505031 - 2³⁹ = 12681245691143 is a prime.

It is a super-2 number, since 2×13231001505031² (a number of 27 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 = 13231001504987 and 13231001505005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231001505041) 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, 44399333761 + ... + 44399334058.

It is an arithmetic number, because the mean of its divisors is an integer number (3329950043250).

Almost surely, 2^{13231001505031} is an apocalyptic number.

13231001505031 is a deficient number, since it is larger than the sum of its proper divisors (88798667969).

13231001505031 is an equidigital number, since it uses as much as digits as its factorization.

13231001505031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88798667968.

The product of its (nonzero) digits is 1350, while the sum is 25.

Adding to 13231001505031 its reverse (13050510013231), we get a palindrome (26281511518262).

The spelling of 13231001505031 in words is "thirteen trillion, two hundred thirty-one billion, one million, five hundred five thousand, thirty-one".