165109722 has 16 divisors (see below), whose sum is σ = 330687360. Its totient is φ = 54958592.

The previous prime is 165109631. The next prime is 165109739. The reversal of 165109722 is 227901561.

It is a super-2 number, since 2×165109722² = 54522440597834568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14823 + ... + 23450.

It is an arithmetic number, because the mean of its divisors is an integer number (20667960).

Almost surely, 2^165109722 is an apocalyptic number.

165109722 is an abundant number, since it is smaller than the sum of its proper divisors (165577638).

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

165109722 is a wasteful number, since it uses less digits than its factorization.

165109722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38997.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 165109722 is about 12849.5027919371. The cubic root of 165109722 is about 548.6022048589.

The spelling of 165109722 in words is "one hundred sixty-five million, one hundred nine thousand, seven hundred twenty-two".