685229222 has 4 divisors (see below), whose sum is σ = 1027843836. Its totient is φ = 342614610.

The previous prime is 685229213. The next prime is 685229231. The reversal of 685229222 is 222922586.

It is a happy number.

685229222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (685229213) and next prime (685229231).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171307304 + ... + 171307307.

It is an arithmetic number, because the mean of its divisors is an integer number (256960959).

Almost surely, 2^685229222 is an apocalyptic number.

685229222 is a deficient number, since it is larger than the sum of its proper divisors (342614614).

685229222 is a wasteful number, since it uses less digits than its factorization.

685229222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342614613.

The product of its digits is 69120, while the sum is 38.

The square root of 685229222 is about 26176.8833515375. The cubic root of 685229222 is about 881.6142984076.

The spelling of 685229222 in words is "six hundred eighty-five million, two hundred twenty-nine thousand, two hundred twenty-two".