31104040520 has 32 divisors (see below), whose sum is σ = 79981819200. Its totient is φ = 10664242368.

The previous prime is 31104040481. The next prime is 31104040523. The reversal of 31104040520 is 2504040113.

It is a super-2 number, since 2×31104040520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31104040492 and 31104040501.

It is not an unprimeable number, because it can be changed into a prime (31104040523) 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, 55542650 + ... + 55543209.

It is an arithmetic number, because the mean of its divisors is an integer number (2499431850).

Almost surely, 2^31104040520 is an apocalyptic number.

It is an amenable number.

31104040520 is an abundant number, since it is smaller than the sum of its proper divisors (48877778680).

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

31104040520 is a wasteful number, since it uses less digits than its factorization.

31104040520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111085877 (or 111085873 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 31104040520 its reverse (2504040113), we get a palindrome (33608080633).

The spelling of 31104040520 in words is "thirty-one billion, one hundred four million, forty thousand, five hundred twenty".