31031331321133 has 32 divisors (see below), whose sum is σ = 37756452851712. Its totient is φ = 25127268196800.

The previous prime is 31031331321131. The next prime is 31031331321139. The reversal of 31031331321133 is 33112313313013.

It is not a de Polignac number, because 31031331321133 - 2¹ = 31031331321131 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 (31031331321131) 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, 32037391 + ... + 32991772.

It is an arithmetic number, because the mean of its divisors is an integer number (1179889151616).

Almost surely, 2^{31031331321133} is an apocalyptic number.

It is an amenable number.

31031331321133 is a deficient number, since it is larger than the sum of its proper divisors (6725121530579).

31031331321133 is a wasteful number, since it uses less digits than its factorization.

31031331321133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65029305.

The product of its (nonzero) digits is 4374, while the sum is 28.

Adding to 31031331321133 its reverse (33112313313013), we get a palindrome (64143644634146).

The spelling of 31031331321133 in words is "thirty-one trillion, thirty-one billion, three hundred thirty-one million, three hundred twenty-one thousand, one hundred thirty-three".