316552221 has 12 divisors (see below), whose sum is σ = 457465372. Its totient is φ = 210931776.

The previous prime is 316552213. The next prime is 316552259. The reversal of 316552221 is 122255613.

It is a happy number.

316552221 is a `hidden beast` number, since 3 + 1 + 655 + 2 + 2 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120692196 + 195860025 = 10986^2 + 13995^2 .

It is not a de Polignac number, because 316552221 - 2³ = 316552213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316552261) 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, 13995 + ... + 28791.

Almost surely, 2^316552221 is an apocalyptic number.

It is an amenable number.

316552221 is a deficient number, since it is larger than the sum of its proper divisors (140913151).

316552221 is a wasteful number, since it uses less digits than its factorization.

316552221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17180 (or 17177 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 316552221 is about 17791.9144838323. The cubic root of 316552221 is about 681.5249951045.

The spelling of 316552221 in words is "three hundred sixteen million, five hundred fifty-two thousand, two hundred twenty-one".