31243320204 has 48 divisors (see below), whose sum is σ = 74721916416. Its totient is φ = 10157400000.

The previous prime is 31243320203. The next prime is 31243320211. The reversal of 31243320204 is 40202334213.

It is a super-2 number, since 2×31243320204² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31243320203) 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, 111172 + ... + 273579.

It is an arithmetic number, because the mean of its divisors is an integer number (1556706592).

Almost surely, 2^31243320204 is an apocalyptic number.

It is an amenable number.

31243320204 is an abundant number, since it is smaller than the sum of its proper divisors (43478596212).

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

31243320204 is a wasteful number, since it uses less digits than its factorization.

31243320204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384926 (or 384924 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 31243320204 its reverse (40202334213), we get a palindrome (71445654417).

The spelling of 31243320204 in words is "thirty-one billion, two hundred forty-three million, three hundred twenty thousand, two hundred four".