685397222 has 16 divisors (see below), whose sum is σ = 1097452800. Its totient is φ = 320087880.

The previous prime is 685397191. The next prime is 685397231. The reversal of 685397222 is 222793586.

685397222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124322 + ... + 129717.

It is an arithmetic number, because the mean of its divisors is an integer number (68590800).

Almost surely, 2^685397222 is an apocalyptic number.

685397222 is a deficient number, since it is larger than the sum of its proper divisors (412055578).

685397222 is a wasteful number, since it uses less digits than its factorization.

685397222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254131.

The product of its digits is 362880, while the sum is 44.

The square root of 685397222 is about 26180.0920930389. The cubic root of 685397222 is about 881.6863419879.

The spelling of 685397222 in words is "six hundred eighty-five million, three hundred ninety-seven thousand, two hundred twenty-two".