31102012230 has 32 divisors (see below), whose sum is σ = 76380758784. Its totient is φ = 8100988896.

The previous prime is 31102012181. The next prime is 31102012231. The reversal of 31102012230 is 3221020113.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31102012231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12053754 + ... + 12056333.

It is an arithmetic number, because the mean of its divisors is an integer number (2386898712).

Almost surely, 2^31102012230 is an apocalyptic number.

31102012230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31102012230 is an abundant number, since it is smaller than the sum of its proper divisors (45278746554).

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

31102012230 is a wasteful number, since it uses less digits than its factorization.

31102012230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24110140.

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

Adding to 31102012230 its reverse (3221020113), we get a palindrome (34323032343).

The spelling of 31102012230 in words is "thirty-one billion, one hundred two million, twelve thousand, two hundred thirty".