31216266261213 has 16 divisors (see below), whose sum is σ = 45694685073216. Its totient is φ = 18798446384640.

The previous prime is 31216266261209. The next prime is 31216266261221.

31216266261213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31216266261213 - 2² = 31216266261209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31216266260213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3012566356 + ... + 3012576717.

It is an arithmetic number, because the mean of its divisors is an integer number (2855917817076).

Almost surely, 2^{31216266261213} is an apocalyptic number.

31216266261213 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31216266261213 is a deficient number, since it is larger than the sum of its proper divisors (14478418812003).

31216266261213 is a wasteful number, since it uses less digits than its factorization.

31216266261213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025143244.

The product of its digits is 186624, while the sum is 42.

It can be divided in two parts, 3121626 and 6261213, that added together give a palindrome (9382839).

The spelling of 31216266261213 in words is "thirty-one trillion, two hundred sixteen billion, two hundred sixty-six million, two hundred sixty-one thousand, two hundred thirteen".