165210165215051 has 8 divisors (see below), whose sum is σ = 180229528663344. Its totient is φ = 150190844686720.

The previous prime is 165210165215009. The next prime is 165210165215131. The reversal of 165210165215051 is 150512561012561.

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 165210165215051 - 2⁶ = 165210165214987 is a prime.

It is a super-3 number, since 3×165210165215051³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165210165235051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400386 + ... + 18335271.

It is an arithmetic number, because the mean of its divisors is an integer number (22528691082918).

Almost surely, 2^{165210165215051} is an apocalyptic number.

165210165215051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165210165215051 is a deficient number, since it is larger than the sum of its proper divisors (15019363448293).

165210165215051 is a wasteful number, since it uses less digits than its factorization.

165210165215051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21459981.

The product of its (nonzero) digits is 90000, while the sum is 41.

The spelling of 165210165215051 in words is "one hundred sixty-five trillion, two hundred ten billion, one hundred sixty-five million, two hundred fifteen thousand, fifty-one".