31120222230 has 48 divisors (see below), whose sum is σ = 81269074224. Its totient is φ = 8262162240.

The previous prime is 31120222207. The next prime is 31120222279. The reversal of 31120222230 is 3222202113.

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

It is a congruent number.

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, 741201 + ... + 782060.

It is an arithmetic number, because the mean of its divisors is an integer number (1693105713).

Almost surely, 2^31120222230 is an apocalyptic number.

31120222230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31120222230 is an abundant number, since it is smaller than the sum of its proper divisors (50148851994).

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

31120222230 is a wasteful number, since it uses less digits than its factorization.

31120222230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523501 (or 1523498 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31120222230 its reverse (3222202113), we get a palindrome (34342424343).

The spelling of 31120222230 in words is "thirty-one billion, one hundred twenty million, two hundred twenty-two thousand, two hundred thirty".