31323322400320 has 28 divisors (see below), whose sum is σ = 74588661466524. Its totient is φ = 12529328960000.

The previous prime is 31323322400273. The next prime is 31323322400401. The reversal of 31323322400320 is 2300422332313.

It can be written as a sum of positive squares in 2 ways, for example, as 21636936008704 + 9686386391616 = 4651552^2 + 3112296^2 .

It is a super-2 number, since 2×31323322400320² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48942690931 + ... + 48942691570.

Almost surely, 2^{31323322400320} is an apocalyptic number.

It is an amenable number.

31323322400320 is an abundant number, since it is smaller than the sum of its proper divisors (43265339066204).

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

31323322400320 is an equidigital number, since it uses as much as digits as its factorization.

31323322400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97885382518 (or 97885382508 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 31323322400320 its reverse (2300422332313), we get a palindrome (33623744732633).

The spelling of 31323322400320 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred twenty-two million, four hundred thousand, three hundred twenty".