31331210103213 has 16 divisors (see below), whose sum is σ = 42912202089216. Its totient is φ = 20319061619520.

The previous prime is 31331210103191. The next prime is 31331210103227. The reversal of 31331210103213 is 31230101213313.

It is not a de Polignac number, because 31331210103213 - 2¹⁷ = 31331209972141 is a prime.

It is a super-2 number, since 2×31331210103213² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331210103253) 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, 26399206 + ... + 27560487.

It is an arithmetic number, because the mean of its divisors is an integer number (2682012630576).

Almost surely, 2^{31331210103213} is an apocalyptic number.

It is an amenable number.

31331210103213 is a deficient number, since it is larger than the sum of its proper divisors (11580991986003).

31331210103213 is a wasteful number, since it uses less digits than its factorization.

31331210103213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53964964.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31331210103213 its reverse (31230101213313), we get a palindrome (62561311316526).

The spelling of 31331210103213 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred ten million, one hundred three thousand, two hundred thirteen".