31223000222 has 4 divisors (see below), whose sum is σ = 46834500336. Its totient is φ = 15611500110.

The previous prime is 31223000209. The next prime is 31223000353. The reversal of 31223000222 is 22200032213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22200032213 = 15551 ⋅1427563.

It is a self number, because there is not a number n which added to its sum of digits gives 31223000222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7805750054 + ... + 7805750057.

It is an arithmetic number, because the mean of its divisors is an integer number (11708625084).

Almost surely, 2^31223000222 is an apocalyptic number.

31223000222 is a deficient number, since it is larger than the sum of its proper divisors (15611500114).

31223000222 is a wasteful number, since it uses less digits than its factorization.

31223000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15611500113.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 31223000222 its reverse (22200032213), we get a palindrome (53423032435).

The spelling of 31223000222 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-two", and thus it is an aban number.