31213631214 has 96 divisors (see below), whose sum is σ = 69720393600. Its totient is φ = 10088245440.

The previous prime is 31213631213. The next prime is 31213631227. The reversal of 31213631214 is 41213631213.

It is a happy number.

31213631214 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 3 + 631 + 21 + 4 = 666.

It is a super-2 number, since 2×31213631214² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213631213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47364817 + ... + 47365475.

It is an arithmetic number, because the mean of its divisors is an integer number (726254100).

Almost surely, 2^31213631214 is an apocalyptic number.

31213631214 is an abundant number, since it is smaller than the sum of its proper divisors (38506762386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31213631214 is a wasteful number, since it uses less digits than its factorization.

31213631214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1227 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Subtracting 31213631214 from its reverse (41213631213), we obtain a palindrome (9999999999).

The spelling of 31213631214 in words is "thirty-one billion, two hundred thirteen million, six hundred thirty-one thousand, two hundred fourteen".