165871383 has 16 divisors (see below), whose sum is σ = 225780192. Its totient is φ = 108288000.

The previous prime is 165871379. The next prime is 165871417. The reversal of 165871383 is 383178561.

It is not a de Polignac number, because 165871383 - 2² = 165871379 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165831383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42223 + ... + 45983.

It is an arithmetic number, because the mean of its divisors is an integer number (14111262).

Almost surely, 2^165871383 is an apocalyptic number.

165871383 is a deficient number, since it is larger than the sum of its proper divisors (59908809).

165871383 is a wasteful number, since it uses less digits than its factorization.

165871383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066.

The product of its digits is 120960, while the sum is 42.

The square root of 165871383 is about 12879.1064519244. The cubic root of 165871383 is about 549.4444892499. Note that the first 4 decimals are identical.

The spelling of 165871383 in words is "one hundred sixty-five million, eight hundred seventy-one thousand, three hundred eighty-three".