31133112302213 has 16 divisors (see below), whose sum is σ = 33789576688560. Its totient is φ = 28569219072000.

The previous prime is 31133112302143. The next prime is 31133112302267. The reversal of 31133112302213 is 31220321133113.

It can be written as a sum of positive squares in 8 ways, for example, as 9422339793889 + 21710772508324 = 3069583^2 + 4659482^2 .

It is a cyclic number.

It is not a de Polignac number, because 31133112302213 - 2⁸ = 31133112301957 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 (31133112302293) 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, 12833918 + ... + 15065711.

It is an arithmetic number, because the mean of its divisors is an integer number (2111848543035).

Almost surely, 2^{31133112302213} is an apocalyptic number.

It is an amenable number.

31133112302213 is a deficient number, since it is larger than the sum of its proper divisors (2656464386347).

31133112302213 is a wasteful number, since it uses less digits than its factorization.

31133112302213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27901288.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31133112302213 its reverse (31220321133113), we get a palindrome (62353433435326).

The spelling of 31133112302213 in words is "thirty-one trillion, one hundred thirty-three billion, one hundred twelve million, three hundred two thousand, two hundred thirteen".