31324112420 has 24 divisors (see below), whose sum is σ = 65815102584. Its totient is φ = 12523079936.

The previous prime is 31324112411. The next prime is 31324112429. The reversal of 31324112420 is 2421142313.

It is an interprime number because it is at equal distance from previous prime (31324112411) and next prime (31324112429).

It can be written as a sum of positive squares in 4 ways, for example, as 9592635364 + 21731477056 = 97942^2 + 147416^2 .

It is not an unprimeable number, because it can be changed into a prime (31324112429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371099 + ... + 447618.

It is an arithmetic number, because the mean of its divisors is an integer number (2742295941).

Almost surely, 2^31324112420 is an apocalyptic number.

It is an amenable number.

31324112420 is an abundant number, since it is smaller than the sum of its proper divisors (34490990164).

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

31324112420 is a wasteful number, since it uses less digits than its factorization.

31324112420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820639 (or 820637 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31324112420 its reverse (2421142313), we get a palindrome (33745254733).

The spelling of 31324112420 in words is "thirty-one billion, three hundred twenty-four million, one hundred twelve thousand, four hundred twenty".