699223221 has 12 divisors (see below), whose sum is σ = 1012590540. Its totient is φ = 464948160.

The previous prime is 699223211. The next prime is 699223229. The reversal of 699223221 is 122322996.

It can be written as a sum of positive squares in 2 ways, for example, as 175271121 + 523952100 = 13239^2 + 22890^2 .

It is not a de Polignac number, because 699223221 - 2⁶ = 699223157 is a prime.

It is a super-2 number, since 2×699223221² = 977826225571229682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699223229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96360 + ... + 103361.

It is an arithmetic number, because the mean of its divisors is an integer number (84382545).

Almost surely, 2^699223221 is an apocalyptic number.

It is an amenable number.

699223221 is a deficient number, since it is larger than the sum of its proper divisors (313367319).

699223221 is a wasteful number, since it uses less digits than its factorization.

699223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200116 (or 200113 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 699223221 is about 26442.8292926457. The cubic root of 699223221 is about 887.5754491434.

The spelling of 699223221 in words is "six hundred ninety-nine million, two hundred twenty-three thousand, two hundred twenty-one".