163351220 has 12 divisors (see below), whose sum is σ = 343037604. Its totient is φ = 65340480.

The previous prime is 163351219. The next prime is 163351231. The reversal of 163351220 is 22153361.

163351220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 37283236 + 126067984 = 6106^2 + 11228^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4083761 + ... + 4083800.

It is an arithmetic number, because the mean of its divisors is an integer number (28586467).

Almost surely, 2^163351220 is an apocalyptic number.

163351220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163351220 is an abundant number, since it is smaller than the sum of its proper divisors (179686384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163351220 is a wasteful number, since it uses less digits than its factorization.

163351220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8167570 (or 8167568 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 163351220 is about 12780.8927700689. The cubic root of 163351220 is about 546.6476189741.

The spelling of 163351220 in words is "one hundred sixty-three million, three hundred fifty-one thousand, two hundred twenty".