31212230223 has 16 divisors (see below), whose sum is σ = 41702887296. Its totient is φ = 20764904160.

The previous prime is 31212230207. The next prime is 31212230263. The reversal of 31212230223 is 32203221213.

It is a happy number.

It is not a de Polignac number, because 31212230223 - 2⁴ = 31212230207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31212230223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31212230263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4148461 + ... + 4155977.

It is an arithmetic number, because the mean of its divisors is an integer number (2606430456).

Almost surely, 2^31212230223 is an apocalyptic number.

31212230223 is a deficient number, since it is larger than the sum of its proper divisors (10490657073).

31212230223 is a wasteful number, since it uses less digits than its factorization.

31212230223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10214.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 31212230223 its reverse (32203221213), we get a palindrome (63415451436).

The spelling of 31212230223 in words is "thirty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred twenty-three".