165195550 has 24 divisors (see below), whose sum is σ = 330900696. Its totient is φ = 60995040.

The previous prime is 165195529. The next prime is 165195577. The reversal of 165195550 is 55591561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126424 + ... + 127723.

It is an arithmetic number, because the mean of its divisors is an integer number (13787529).

Almost surely, 2^165195550 is an apocalyptic number.

165195550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165195550 is an abundant number, since it is smaller than the sum of its proper divisors (165705146).

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

165195550 is a wasteful number, since it uses less digits than its factorization.

165195550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254172 (or 254167 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 37.

The square root of 165195550 is about 12852.8420981509. The cubic root of 165195550 is about 548.6972472609.

The spelling of 165195550 in words is "one hundred sixty-five million, one hundred ninety-five thousand, five hundred fifty".