31033722113 has 4 divisors (see below), whose sum is σ = 31458841668. Its totient is φ = 30608602560.

The previous prime is 31033722061. The next prime is 31033722133. The reversal of 31033722113 is 31122733013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31122733013 = 10993 ⋅2831141.

It can be written as a sum of positive squares in 2 ways, for example, as 25469606464 + 5564115649 = 159592^2 + 74593^2 .

It is a cyclic number.

It is not a de Polignac number, because 31033722113 - 2¹² = 31033718017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31033722133) 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, 212559668 + ... + 212559813.

It is an arithmetic number, because the mean of its divisors is an integer number (7864710417).

Almost surely, 2^31033722113 is an apocalyptic number.

It is an amenable number.

31033722113 is a deficient number, since it is larger than the sum of its proper divisors (425119555).

31033722113 is an equidigital number, since it uses as much as digits as its factorization.

31033722113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425119554.

The product of its (nonzero) digits is 2268, while the sum is 26.

The spelling of 31033722113 in words is "thirty-one billion, thirty-three million, seven hundred twenty-two thousand, one hundred thirteen".