31033131013 has 4 divisors (see below), whose sum is σ = 31206500640. Its totient is φ = 30859761388.

The previous prime is 31033130983. The next prime is 31033131119. The reversal of 31033131013 is 31013133013.

It is a happy number.

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 31033131013 - 2³³ = 22443196421 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 (31033131413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86684545 + ... + 86684902.

It is an arithmetic number, because the mean of its divisors is an integer number (7801625160).

Almost surely, 2^31033131013 is an apocalyptic number.

It is an amenable number.

31033131013 is a deficient number, since it is larger than the sum of its proper divisors (173369627).

31033131013 is a wasteful number, since it uses less digits than its factorization.

31033131013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173369626.

The product of its (nonzero) digits is 243, while the sum is 19.

Adding to 31033131013 its reverse (31013133013), we get a palindrome (62046264026).

The spelling of 31033131013 in words is "thirty-one billion, thirty-three million, one hundred thirty-one thousand, thirteen".