31130300220 has 48 divisors (see below), whose sum is σ = 87185911680. Its totient is φ = 8299406656.

The previous prime is 31130300191. The next prime is 31130300221. The reversal of 31130300220 is 2200303113.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31130300220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130300221) 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, 196411 + ... + 317549.

It is an arithmetic number, because the mean of its divisors is an integer number (1816373160).

Almost surely, 2^31130300220 is an apocalyptic number.

31130300220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31130300220 is an abundant number, since it is smaller than the sum of its proper divisors (56055611460).

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

31130300220 is a wasteful number, since it uses less digits than its factorization.

31130300220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125434 (or 125432 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 31130300220 its reverse (2200303113), we get a palindrome (33330603333).

The spelling of 31130300220 in words is "thirty-one billion, one hundred thirty million, three hundred thousand, two hundred twenty".