165427517 has 4 divisors (see below), whose sum is σ = 165590880. Its totient is φ = 165264156.

The previous prime is 165427499. The next prime is 165427519. The reversal of 165427517 is 715724561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165427517 - 2⁸ = 165427261 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 (165427519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80153 + ... + 82190.

It is an arithmetic number, because the mean of its divisors is an integer number (41397720).

Almost surely, 2^165427517 is an apocalyptic number.

It is an amenable number.

165427517 is a deficient number, since it is larger than the sum of its proper divisors (163363).

165427517 is a wasteful number, since it uses less digits than its factorization.

165427517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163362.

The product of its digits is 58800, while the sum is 38.

The square root of 165427517 is about 12861.8628899549. The cubic root of 165427517 is about 548.9539533799.

The spelling of 165427517 in words is "one hundred sixty-five million, four hundred twenty-seven thousand, five hundred seventeen".