31431312204 has 48 divisors (see below), whose sum is σ = 73830113280. Its totient is φ = 10407208960.

The previous prime is 31431312203. The next prime is 31431312271. The reversal of 31431312204 is 40221313413.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31431312203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638412 + ... + 1657484.

It is an arithmetic number, because the mean of its divisors is an integer number (1538127360).

Almost surely, 2^31431312204 is an apocalyptic number.

It is an amenable number.

31431312204 is an abundant number, since it is smaller than the sum of its proper divisors (42398801076).

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

31431312204 is a wasteful number, since it uses less digits than its factorization.

31431312204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19990 (or 19988 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31431312204 its reverse (40221313413), we get a palindrome (71652625617).

The spelling of 31431312204 in words is "thirty-one billion, four hundred thirty-one million, three hundred twelve thousand, two hundred four".