31204323120 has 80 divisors (see below), whose sum is σ = 96781305600. Its totient is φ = 8317032192.

The previous prime is 31204323103. The next prime is 31204323121. The reversal of 31204323120 is 2132340213.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (31204323121) 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, 469731 + ... + 532029.

It is an arithmetic number, because the mean of its divisors is an integer number (1209766320).

Almost surely, 2^31204323120 is an apocalyptic number.

31204323120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31204323120 is an abundant number, since it is smaller than the sum of its proper divisors (65576982480).

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

31204323120 is a wasteful number, since it uses less digits than its factorization.

31204323120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64402 (or 64396 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31204323120 its reverse (2132340213), we get a palindrome (33336663333).

The spelling of 31204323120 in words is "thirty-one billion, two hundred four million, three hundred twenty-three thousand, one hundred twenty".