31143312204 has 24 divisors (see below), whose sum is σ = 72779029680. Its totient is φ = 10365203904.

The previous prime is 31143312203. The next prime is 31143312223. The reversal of 31143312204 is 40221334113.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31143312203) 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, 1979359 + ... + 1995030.

It is an arithmetic number, because the mean of its divisors is an integer number (3032459570).

Almost surely, 2^31143312204 is an apocalyptic number.

It is an amenable number.

31143312204 is an abundant number, since it is smaller than the sum of its proper divisors (41635717476).

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

31143312204 is a wasteful number, since it uses less digits than its factorization.

31143312204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3975049 (or 3975047 counting only the distinct ones).

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

Adding to 31143312204 its reverse (40221334113), we get a palindrome (71364646317).

The spelling of 31143312204 in words is "thirty-one billion, one hundred forty-three million, three hundred twelve thousand, two hundred four".