163221351 has 8 divisors (see below), whose sum is σ = 217839744. Its totient is φ = 108708600.

The previous prime is 163221349. The next prime is 163221407. The reversal of 163221351 is 153122361.

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

It is not a de Polignac number, because 163221351 - 2¹ = 163221349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163221551) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 22731 + ... + 29036.

It is an arithmetic number, because the mean of its divisors is an integer number (27229968).

Almost surely, 2^163221351 is an apocalyptic number.

163221351 is a deficient number, since it is larger than the sum of its proper divisors (54618393).

163221351 is a wasteful number, since it uses less digits than its factorization.

163221351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52821.

The product of its digits is 1080, while the sum is 24.

The square root of 163221351 is about 12775.8111679846. The cubic root of 163221351 is about 546.5027136148.

The spelling of 163221351 in words is "one hundred sixty-three million, two hundred twenty-one thousand, three hundred fifty-one".