31112212230 has 48 divisors (see below), whose sum is σ = 88245550224. Its totient is φ = 7542354240.

The previous prime is 31112212213. The next prime is 31112212231. The reversal of 31112212230 is 3221221113.

31112212230 is a `hidden beast` number, since 311 + 122 + 1 + 2 + 230 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112212231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15712249 + ... + 15714228.

It is an arithmetic number, because the mean of its divisors is an integer number (1838448963).

Almost surely, 2^31112212230 is an apocalyptic number.

31112212230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31112212230 is an abundant number, since it is smaller than the sum of its proper divisors (57133337994).

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

31112212230 is a wasteful number, since it uses less digits than its factorization.

31112212230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31426501 (or 31426498 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31112212230 its reverse (3221221113), we get a palindrome (34333433343).

It can be divided in two parts, 31112 and 212230, that added together give a palindrome (243342).

The spelling of 31112212230 in words is "thirty-one billion, one hundred twelve million, two hundred twelve thousand, two hundred thirty".