165315899 has 8 divisors (see below), whose sum is σ = 189893088. Its totient is φ = 140978880.

The previous prime is 165315893. The next prime is 165315911. The reversal of 165315899 is 998513561.

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

It is not a de Polignac number, because 165315899 - 2¹⁶ = 165250363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165315893) 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, 58562 + ... + 61319.

It is an arithmetic number, because the mean of its divisors is an integer number (23736636).

Almost surely, 2^165315899 is an apocalyptic number.

165315899 is a deficient number, since it is larger than the sum of its proper divisors (24577189).

165315899 is a wasteful number, since it uses less digits than its factorization.

165315899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120085.

The product of its digits is 291600, while the sum is 47.

The square root of 165315899 is about 12857.5230507279. The cubic root of 165315899 is about 548.8304613727.

The spelling of 165315899 in words is "one hundred sixty-five million, three hundred fifteen thousand, eight hundred ninety-nine".