31200220004 has 12 divisors (see below), whose sum is σ = 54603799404. Its totient is φ = 15599134464.

The previous prime is 31200220001. The next prime is 31200220039. The reversal of 31200220004 is 40002200213.

It can be written as a sum of positive squares in 2 ways, for example, as 18409062400 + 12791157604 = 135680^2 + 113098^2 .

It is not an unprimeable number, because it can be changed into a prime (31200220001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169397 + ... + 301820.

It is an arithmetic number, because the mean of its divisors is an integer number (4550316617).

Almost surely, 2^31200220004 is an apocalyptic number.

It is an amenable number.

31200220004 is a deficient number, since it is larger than the sum of its proper divisors (23403579400).

31200220004 is a wasteful number, since it uses less digits than its factorization.

31200220004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487774 (or 487772 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 31200220004 its reverse (40002200213), we get a palindrome (71202420217).

The spelling of 31200220004 in words is "thirty-one billion, two hundred million, two hundred twenty thousand, four".