31321131133 has 4 divisors (see below), whose sum is σ = 31445916768. Its totient is φ = 31196345500.

The previous prime is 31321131103. The next prime is 31321131151. The reversal of 31321131133 is 33113112313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31321131133 - 2³³ = 22731196541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31321131103) 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, 62392441 + ... + 62392942.

It is an arithmetic number, because the mean of its divisors is an integer number (7861479192).

Almost surely, 2^31321131133 is an apocalyptic number.

It is an amenable number.

31321131133 is a deficient number, since it is larger than the sum of its proper divisors (124785635).

31321131133 is a wasteful number, since it uses less digits than its factorization.

31321131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124785634.

The product of its digits is 486, while the sum is 22.

Adding to 31321131133 its reverse (33113112313), we get a palindrome (64434243446).

The spelling of 31321131133 in words is "thirty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, one hundred thirty-three".