686455222 has 4 divisors (see below), whose sum is σ = 1029682836. Its totient is φ = 343227610.

The previous prime is 686455213. The next prime is 686455279. The reversal of 686455222 is 222554686.

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

It is a super-2 number, since 2×686455222² = 942441543622138568, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 171613804 + ... + 171613807.

It is an arithmetic number, because the mean of its divisors is an integer number (257420709).

Almost surely, 2^686455222 is an apocalyptic number.

686455222 is a deficient number, since it is larger than the sum of its proper divisors (343227614).

686455222 is a wasteful number, since it uses less digits than its factorization.

686455222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343227613.

The product of its digits is 230400, while the sum is 40.

The square root of 686455222 is about 26200.2904945728. The cubic root of 686455222 is about 882.1397747091.

The spelling of 686455222 in words is "six hundred eighty-six million, four hundred fifty-five thousand, two hundred twenty-two".