312500222 has 16 divisors (see below), whose sum is σ = 496711440. Its totient is φ = 146944128.

The previous prime is 312500213. The next prime is 312500269. The reversal of 312500222 is 222005213.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 312500222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53993 + ... + 59499.

It is an arithmetic number, because the mean of its divisors is an integer number (31044465).

Almost surely, 2^312500222 is an apocalyptic number.

312500222 is a deficient number, since it is larger than the sum of its proper divisors (184211218).

312500222 is a wasteful number, since it uses less digits than its factorization.

312500222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 312500222 is about 17677.6758087708. The cubic root of 312500222 is about 678.6045648422.

Adding to 312500222 its reverse (222005213), we get a palindrome (534505435).

The spelling of 312500222 in words is "three hundred twelve million, five hundred thousand, two hundred twenty-two".