165233565 has 48 divisors (see below), whose sum is σ = 337898496. Its totient is φ = 73094400.

The previous prime is 165233539. The next prime is 165233597. The reversal of 165233565 is 565332561.

165233565 is a `hidden beast` number, since 1 + 65 + 2 + 33 + 565 = 666.

It is not a de Polignac number, because 165233565 - 2⁶ = 165233501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1305 + ... + 18225.

It is an arithmetic number, because the mean of its divisors is an integer number (7039552).

Almost surely, 2^165233565 is an apocalyptic number.

165233565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165233565 is an abundant number, since it is smaller than the sum of its proper divisors (172664931).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165233565 is a wasteful number, since it uses less digits than its factorization.

165233565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970 (or 16967 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 165233565 is about 12854.3208688752. The cubic root of 165233565 is about 548.7393329911.

The spelling of 165233565 in words is "one hundred sixty-five million, two hundred thirty-three thousand, five hundred sixty-five".