165221292 has 12 divisors (see below), whose sum is σ = 385516376. Its totient is φ = 55073760.

The previous prime is 165221281. The next prime is 165221293. The reversal of 165221292 is 292122561.

165221292 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (165221293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6884209 + ... + 6884232.

Almost surely, 2^165221292 is an apocalyptic number.

165221292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165221292 is an abundant number, since it is smaller than the sum of its proper divisors (220295084).

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

165221292 is a wasteful number, since it uses less digits than its factorization.

165221292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13768448 (or 13768446 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 165221292 is about 12853.8434718959. The cubic root of 165221292 is about 548.7257464768.

The spelling of 165221292 in words is "one hundred sixty-five million, two hundred twenty-one thousand, two hundred ninety-two".