165253900 has 36 divisors (see below), whose sum is σ = 409831408. Its totient is φ = 56658240.

The previous prime is 165253883. The next prime is 165253909. The reversal of 165253900 is 9352561.

It is not an unprimeable number, because it can be changed into a prime (165253909) 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 11 ways as a sum of consecutive naturals, for example, 117339 + ... + 118738.

Almost surely, 2^165253900 is an apocalyptic number.

165253900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165253900 is an abundant number, since it is smaller than the sum of its proper divisors (244577508).

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

165253900 is a wasteful number, since it uses less digits than its factorization.

165253900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236098 (or 236091 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 165253900 is about 12855.1118237066. Note that the first 3 decimals coincide. The cubic root of 165253900 is about 548.7618428579.

The spelling of 165253900 in words is "one hundred sixty-five million, two hundred fifty-three thousand, nine hundred".