31213414320 has 160 divisors (see below), whose sum is σ = 111113959680. Its totient is φ = 7168619520.

The previous prime is 31213414289. The next prime is 31213414321. The reversal of 31213414320 is 2341431213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31213414321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260979 + ... + 361298.

It is an arithmetic number, because the mean of its divisors is an integer number (694462248).

Almost surely, 2^31213414320 is an apocalyptic number.

31213414320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31213414320 is an abundant number, since it is smaller than the sum of its proper divisors (79900545360).

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

31213414320 is a wasteful number, since it uses less digits than its factorization.

31213414320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622323 (or 622317 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31213414320 its reverse (2341431213), we get a palindrome (33554845533).

The spelling of 31213414320 in words is "thirty-one billion, two hundred thirteen million, four hundred fourteen thousand, three hundred twenty".