31214222 has 16 divisors (see below), whose sum is σ = 50621760. Its totient is φ = 14349792.

The previous prime is 31214219. The next prime is 31214231. The reversal of 31214222 is 22241213.

It is a self number, because there is not a number n which added to its sum of digits gives 31214222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4763 + ... + 9225.

It is an arithmetic number, because the mean of its divisors is an integer number (3163860).

Almost surely, 2^31214222 is an apocalyptic number.

31214222 is a deficient number, since it is larger than the sum of its proper divisors (19407538).

31214222 is a wasteful number, since it uses less digits than its factorization.

31214222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4747.

The product of its digits is 192, while the sum is 17.

The square root of 31214222 is about 5586.9689456807. The cubic root of 31214222 is about 314.8600100223.

Adding to 31214222 its reverse (22241213), we get a palindrome (53455435).

The spelling of 31214222 in words is "thirty-one million, two hundred fourteen thousand, two hundred twenty-two".