312131222 has 8 divisors (see below), whose sum is σ = 504212016. Its totient is φ = 144060552.

The previous prime is 312131207. The next prime is 312131233. The reversal of 312131222 is 222131213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 312131222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6002498 + ... + 6002549.

It is an arithmetic number, because the mean of its divisors is an integer number (63026502).

Almost surely, 2^312131222 is an apocalyptic number.

312131222 is a deficient number, since it is larger than the sum of its proper divisors (192080794).

312131222 is a wasteful number, since it uses less digits than its factorization.

312131222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12005062.

The product of its digits is 144, while the sum is 17.

The square root of 312131222 is about 17667.2358335989. The cubic root of 312131222 is about 678.3373610763.

Adding to 312131222 its reverse (222131213), we get a palindrome (534262435).

Subtracting from 312131222 its reverse (222131213), we obtain a palindrome (90000009).

It can be divided in two parts, 3121 and 31222, that added together give a palindrome (34343).

The spelling of 312131222 in words is "three hundred twelve million, one hundred thirty-one thousand, two hundred twenty-two".