165401375 has 16 divisors (see below), whose sum is σ = 207230400. Its totient is φ = 131802400.

The previous prime is 165401363. The next prime is 165401389. The reversal of 165401375 is 573104561.

It is not a de Polignac number, because 165401375 - 2⁶ = 165401311 is a prime.

It is a super-2 number, since 2×165401375² = 54715229703781250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31166 + ... + 36084.

It is an arithmetic number, because the mean of its divisors is an integer number (12951900).

Almost surely, 2^165401375 is an apocalyptic number.

165401375 is a deficient number, since it is larger than the sum of its proper divisors (41829025).

165401375 is an equidigital number, since it uses as much as digits as its factorization.

165401375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5203 (or 5193 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 165401375 is about 12860.8465895523. The cubic root of 165401375 is about 548.9250353569.

The spelling of 165401375 in words is "one hundred sixty-five million, four hundred one thousand, three hundred seventy-five".