31010232218 has 24 divisors (see below), whose sum is σ = 56462290272. Its totient is φ = 12712268184.

The previous prime is 31010232217. The next prime is 31010232233. The reversal of 31010232218 is 81223201013.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31010232193 and 31010232202.

It is not an unprimeable number, because it can be changed into a prime (31010232217) 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 11 ways as a sum of consecutive naturals, for example, 6876680 + ... + 6881187.

It is an arithmetic number, because the mean of its divisors is an integer number (2352595428).

Almost surely, 2^31010232218 is an apocalyptic number.

31010232218 is a deficient number, since it is larger than the sum of its proper divisors (25452058054).

31010232218 is a wasteful number, since it uses less digits than its factorization.

31010232218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13757906 (or 13757899 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 31010232218 in words is "thirty-one billion, ten million, two hundred thirty-two thousand, two hundred eighteen".