163221763 has 6 divisors (see below), whose sum is σ = 167753796. Its totient is φ = 158809032.

The previous prime is 163221749. The next prime is 163221781. The reversal of 163221763 is 367122361.

It is a de Polignac number, because none of the positive numbers 2^k-163221763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163221713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58245 + ... + 60982.

It is an arithmetic number, because the mean of its divisors is an integer number (27958966).

Almost surely, 2^163221763 is an apocalyptic number.

163221763 is a deficient number, since it is larger than the sum of its proper divisors (4532033).

163221763 is an equidigital number, since it uses as much as digits as its factorization.

163221763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119301 (or 119264 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 163221763 is about 12775.8272921952. The cubic root of 163221763 is about 546.5031734381.

The spelling of 163221763 in words is "one hundred sixty-three million, two hundred twenty-one thousand, seven hundred sixty-three".