31222213002 has 24 divisors (see below), whose sum is σ = 67651495236. Its totient is φ = 10406886336.

The previous prime is 31222212979. The next prime is 31222213021. The reversal of 31222213002 is 20031222213.

31222213002 is a `hidden beast` number, since 312 + 222 + 130 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24667529481 + 6554683521 = 157059^2 + 80961^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 545448 + ... + 599964.

Almost surely, 2^31222213002 is an apocalyptic number.

31222213002 is an abundant number, since it is smaller than the sum of its proper divisors (36429282234).

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

31222213002 is a wasteful number, since it uses less digits than its factorization.

31222213002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86342 (or 86339 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31222213002 its reverse (20031222213), we get a palindrome (51253435215).

The spelling of 31222213002 in words is "thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, two".