31243204000 has 48 divisors (see below), whose sum is σ = 76764562056. Its totient is φ = 12497280000.

The previous prime is 31243203989. The next prime is 31243204007. The reversal of 31243204000 is 40234213.

It can be written as a sum of positive squares in 4 ways, for example, as 14196245904 + 17046958096 = 119148^2 + 130564^2 .

It is a super-2 number, since 2×31243204000² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31243204007) 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, 3901401 + ... + 3909400.

Almost surely, 2^31243204000 is an apocalyptic number.

It is an amenable number.

31243204000 is an abundant number, since it is smaller than the sum of its proper divisors (45521358056).

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

31243204000 is an equidigital number, since it uses as much as digits as its factorization.

31243204000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810826 (or 7810808 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 31243204000 its reverse (40234213), we get a palindrome (31283438213).

The spelling of 31243204000 in words is "thirty-one billion, two hundred forty-three million, two hundred four thousand".