165422816 has 48 divisors (see below), whose sum is σ = 369205200. Its totient is φ = 72327168.

The previous prime is 165422813. The next prime is 165422821. The reversal of 165422816 is 618224561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165422813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561 + ... + 18368.

It is an arithmetic number, because the mean of its divisors is an integer number (7691775).

Almost surely, 2^165422816 is an apocalyptic number.

165422816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165422816 is an abundant number, since it is smaller than the sum of its proper divisors (203782384).

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

165422816 is a wasteful number, since it uses less digits than its factorization.

165422816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20971 (or 20963 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 165422816 is about 12861.6801390798. The cubic root of 165422816 is about 548.9487534047.

The spelling of 165422816 in words is "one hundred sixty-five million, four hundred twenty-two thousand, eight hundred sixteen".