31312444421352 has 64 divisors (see below), whose sum is σ = 78413535682560. Its totient is φ = 10419829145600.

The previous prime is 31312444421351. The next prime is 31312444421359. The reversal of 31312444421352 is 25312444421313.

It is a super-2 number, since 2×31312444421352² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31312444421352.

It is not an unprimeable number, because it can be changed into a prime (31312444421351) 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, 120496153 + ... + 120755735.

It is an arithmetic number, because the mean of its divisors is an integer number (1225211495040).

Almost surely, 2^{31312444421352} is an apocalyptic number.

It is an amenable number.

31312444421352 is an abundant number, since it is smaller than the sum of its proper divisors (47101091261208).

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

31312444421352 is a wasteful number, since it uses less digits than its factorization.

31312444421352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268074 (or 268070 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

Subtracting from 31312444421352 its sum of digits (39), we obtain a palindrome (31312444421313).

Adding to 31312444421352 its reverse (25312444421313), we get a palindrome (56624888842665).

The spelling of 31312444421352 in words is "thirty-one trillion, three hundred twelve billion, four hundred forty-four million, four hundred twenty-one thousand, three hundred fifty-two".