31302221130 has 48 divisors (see below), whose sum is σ = 81477736704. Its totient is φ = 8337827040.

The previous prime is 31302221123. The next prime is 31302221189. The reversal of 31302221130 is 3112220313.

31302221130 is a `hidden beast` number, since 313 + 0 + 2 + 221 + 130 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116226 + ... + 275885.

It is an arithmetic number, because the mean of its divisors is an integer number (1697452848).

Almost surely, 2^31302221130 is an apocalyptic number.

31302221130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31302221130 is an abundant number, since it is smaller than the sum of its proper divisors (50175515574).

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

31302221130 is a wasteful number, since it uses less digits than its factorization.

31302221130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393011 (or 393008 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31302221130 its reverse (3112220313), we get a palindrome (34414441443).

The spelling of 31302221130 in words is "thirty-one billion, three hundred two million, two hundred twenty-one thousand, one hundred thirty".