163221445 has 8 divisors (see below), whose sum is σ = 197275680. Its totient is φ = 129637200.

The previous prime is 163221431. The next prime is 163221449. The reversal of 163221445 is 544122361.

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

It is not a de Polignac number, because 163221445 - 2¹⁵ = 163188677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163221449) 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, 116731 + ... + 118120.

It is an arithmetic number, because the mean of its divisors is an integer number (24659460).

Almost surely, 2^163221445 is an apocalyptic number.

It is an amenable number.

163221445 is a deficient number, since it is larger than the sum of its proper divisors (34054235).

163221445 is a wasteful number, since it uses less digits than its factorization.

163221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234995.

The product of its digits is 5760, while the sum is 28.

The square root of 163221445 is about 12775.8148468111. The cubic root of 163221445 is about 546.5028185260.

The spelling of 163221445 in words is "one hundred sixty-three million, two hundred twenty-one thousand, four hundred forty-five".