163221077 has 24 divisors (see below), whose sum is σ = 184087200. Its totient is φ = 144069408.

The previous prime is 163221073. The next prime is 163221089. The reversal of 163221077 is 770122361.

It is not a de Polignac number, because 163221077 - 2² = 163221073 is a prime.

It is a super-2 number, since 2×163221077² = 53282239954079858, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163221073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1966478 + ... + 1966560.

It is an arithmetic number, because the mean of its divisors is an integer number (7670300).

Almost surely, 2^163221077 is an apocalyptic number.

It is an amenable number.

163221077 is a deficient number, since it is larger than the sum of its proper divisors (20866123).

163221077 is an equidigital number, since it uses as much as digits as its factorization.

163221077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 163221077 is about 12775.8004445905. The cubic root of 163221077 is about 546.5024078096.

The spelling of 163221077 in words is "one hundred sixty-three million, two hundred twenty-one thousand, seventy-seven".