165072190 has 16 divisors (see below), whose sum is σ = 312768720. Its totient is φ = 62553600.

The previous prime is 165072169. The next prime is 165072197. The reversal of 165072190 is 91270561.

It is a super-2 number, since 2×165072190² = 54497655822792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165072197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434211 + ... + 434590.

It is an arithmetic number, because the mean of its divisors is an integer number (19548045).

Almost surely, 2^165072190 is an apocalyptic number.

165072190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165072190 is a deficient number, since it is larger than the sum of its proper divisors (147696530).

165072190 is a wasteful number, since it uses less digits than its factorization.

165072190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868827.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 165072190 is about 12848.0422633178. The cubic root of 165072190 is about 548.5606331129.

The spelling of 165072190 in words is "one hundred sixty-five million, seventy-two thousand, one hundred ninety".