31004111320 has 384 divisors, whose sum is σ = 91755555840. Its totient is φ = 9212037120.

The previous prime is 31004111309. The next prime is 31004111329. The reversal of 31004111320 is 2311140013.

It is a super-2 number, since 2×31004111320² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31004111294 and 31004111303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004111329) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 66389727 + ... + 66390193.

It is an arithmetic number, because the mean of its divisors is an integer number (238946760).

Almost surely, 2^31004111320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31004111320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45877777920).

31004111320 is an abundant number, since it is smaller than the sum of its proper divisors (60751444520).

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

31004111320 is a wasteful number, since it uses less digits than its factorization.

31004111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31004111320 its reverse (2311140013), we get a palindrome (33315251333).

The spelling of 31004111320 in words is "thirty-one billion, four million, one hundred eleven thousand, three hundred twenty".