31081500230 has 32 divisors (see below), whose sum is σ = 63137348640. Its totient is φ = 10912625920.

The previous prime is 31081500199. The next prime is 31081500257. The reversal of 31081500230 is 3200518013.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31081500196 and 31081500205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4868519 + ... + 4874898.

It is an arithmetic number, because the mean of its divisors is an integer number (1973042145).

Almost surely, 2^31081500230 is an apocalyptic number.

31081500230 is an abundant number, since it is smaller than the sum of its proper divisors (32055848410).

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

31081500230 is a wasteful number, since it uses less digits than its factorization.

31081500230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9743464.

The product of its (nonzero) digits is 720, while the sum is 23.

The spelling of 31081500230 in words is "thirty-one billion, eighty-one million, five hundred thousand, two hundred thirty".