31231131233133 has 16 divisors (see below), whose sum is σ = 44844833307456. Its totient is φ = 19219101089280.

The previous prime is 31231131233117. The next prime is 31231131233143. The reversal of 31231131233133 is 33133213113213.

It is not a de Polignac number, because 31231131233133 - 2⁴ = 31231131233117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31231131233133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231131233143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15070141 + ... + 17016797.

It is an arithmetic number, because the mean of its divisors is an integer number (2802802081716).

Almost surely, 2^{31231131233133} is an apocalyptic number.

It is an amenable number.

31231131233133 is a deficient number, since it is larger than the sum of its proper divisors (13613702074323).

31231131233133 is a wasteful number, since it uses less digits than its factorization.

31231131233133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358044.

The product of its digits is 8748, while the sum is 30.

Adding to 31231131233133 its reverse (33133213113213), we get a palindrome (64364344346346).

The spelling of 31231131233133 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred thirty-three".