31242220004000 has 48 divisors (see below), whose sum is σ = 76762134559656. Its totient is φ = 12496888000000.

The previous prime is 31242220003999. The next prime is 31242220004053. The reversal of 31242220004000 is 40002224213.

It can be written as a sum of positive squares in 4 ways, for example, as 5447238580624 + 25794981423376 = 2333932^2 + 5078876^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3905273501 + ... + 3905281500.

Almost surely, 2^{31242220004000} is an apocalyptic number.

It is an amenable number.

31242220004000 is an abundant number, since it is smaller than the sum of its proper divisors (45519914555656).

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

31242220004000 is an equidigital number, since it uses as much as digits as its factorization.

31242220004000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810555026 (or 7810555008 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31242220004000 its reverse (40002224213), we get a palindrome (31282222228213).

The spelling of 31242220004000 in words is "thirty-one trillion, two hundred forty-two billion, two hundred twenty million, four thousand".