163224557 has 8 divisors (see below), whose sum is σ = 170405400. Its totient is φ = 156147264.

The previous prime is 163224553. The next prime is 163224571. The reversal of 163224557 is 755422361.

It can be written as a sum of positive squares in 4 ways, for example, as 26357956 + 136866601 = 5134^2 + 11699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163224557 - 2² = 163224553 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 (163224553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22658 + ... + 28979.

It is an arithmetic number, because the mean of its divisors is an integer number (21300675).

Almost surely, 2^163224557 is an apocalyptic number.

It is an amenable number.

163224557 is a deficient number, since it is larger than the sum of its proper divisors (7180843).

163224557 is a wasteful number, since it uses less digits than its factorization.

163224557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51775.

The product of its digits is 50400, while the sum is 35.

The square root of 163224557 is about 12775.9366388535. The cubic root of 163224557 is about 546.5062917338.

The spelling of 163224557 in words is "one hundred sixty-three million, two hundred twenty-four thousand, five hundred fifty-seven".