165401527 has 4 divisors (see below), whose sum is σ = 165561760. Its totient is φ = 165241296.

The previous prime is 165401519. The next prime is 165401557. The reversal of 165401527 is 725104561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165401527 - 2³ = 165401519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165401557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78558 + ... + 80635.

It is an arithmetic number, because the mean of its divisors is an integer number (41390440).

Almost surely, 2^165401527 is an apocalyptic number.

165401527 is a deficient number, since it is larger than the sum of its proper divisors (160233).

165401527 is a wasteful number, since it uses less digits than its factorization.

165401527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160232.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 165401527 is about 12860.8524989598. The cubic root of 165401527 is about 548.9252035066.

The spelling of 165401527 in words is "one hundred sixty-five million, four hundred one thousand, five hundred twenty-seven".