165251420 has 12 divisors (see below), whose sum is σ = 347028024. Its totient is φ = 66100560.

The previous prime is 165251399. The next prime is 165251447. The reversal of 165251420 is 24152561.

165251420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165251420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4131266 + ... + 4131305.

It is an arithmetic number, because the mean of its divisors is an integer number (28919002).

Almost surely, 2^165251420 is an apocalyptic number.

165251420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165251420 is an abundant number, since it is smaller than the sum of its proper divisors (181776604).

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

165251420 is a wasteful number, since it uses less digits than its factorization.

165251420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8262580 (or 8262578 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 165251420 is about 12855.0153636625. The cubic root of 165251420 is about 548.7590977160.

The spelling of 165251420 in words is "one hundred sixty-five million, two hundred fifty-one thousand, four hundred twenty".