165215055 has 8 divisors (see below), whose sum is σ = 264344112. Its totient is φ = 88114688.

The previous prime is 165215053. The next prime is 165215077. The reversal of 165215055 is 550512561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165215055 - 2¹ = 165215053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165215053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507154 + ... + 5507183.

It is an arithmetic number, because the mean of its divisors is an integer number (33043014).

Almost surely, 2^165215055 is an apocalyptic number.

165215055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165215055 is a deficient number, since it is larger than the sum of its proper divisors (99129057).

165215055 is a wasteful number, since it uses less digits than its factorization.

165215055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11014345.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 165215055 is about 12853.6008573473. The cubic root of 165215055 is about 548.7188417058.

The spelling of 165215055 in words is "one hundred sixty-five million, two hundred fifteen thousand, fifty-five".