165161215 has 8 divisors (see below), whose sum is σ = 198832608. Its totient is φ = 131702880.

The previous prime is 165161209. The next prime is 165161219. The reversal of 165161215 is 512161561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165161215 - 2³ = 165161207 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 (165161219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51552 + ... + 54661.

It is an arithmetic number, because the mean of its divisors is an integer number (24854076).

Almost surely, 2^165161215 is an apocalyptic number.

165161215 is a deficient number, since it is larger than the sum of its proper divisors (33671393).

165161215 is a wasteful number, since it uses less digits than its factorization.

165161215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106529.

The product of its digits is 1800, while the sum is 28.

The square root of 165161215 is about 12851.5063319441. The cubic root of 165161215 is about 548.6592300436.

The spelling of 165161215 in words is "one hundred sixty-five million, one hundred sixty-one thousand, two hundred fifteen".