31020112230 has 64 divisors (see below), whose sum is σ = 75779810496. Its totient is φ = 8124480000.

The previous prime is 31020112229. The next prime is 31020112241. The reversal of 31020112230 is 3221102013.

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

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 1270740 + ... + 1294920.

It is an arithmetic number, because the mean of its divisors is an integer number (1184059539).

Almost surely, 2^31020112230 is an apocalyptic number.

31020112230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020112230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37889905248).

31020112230 is an abundant number, since it is smaller than the sum of its proper divisors (44759698266).

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

31020112230 is a wasteful number, since it uses less digits than its factorization.

31020112230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24953.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020112230 its reverse (3221102013), we get a palindrome (34241214243).

The spelling of 31020112230 in words is "thirty-one billion, twenty million, one hundred twelve thousand, two hundred thirty".