165433081 has 16 divisors (see below), whose sum is σ = 192729600. Its totient is φ = 140515200.

The previous prime is 165433013. The next prime is 165433123. The reversal of 165433081 is 180334561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165433081 is a prime.

It is a super-2 number, since 2×165433081² = 54736208578305122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165413081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525 + ... + 18253.

It is an arithmetic number, because the mean of its divisors is an integer number (12045600).

Almost surely, 2^165433081 is an apocalyptic number.

165433081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165433081 is a deficient number, since it is larger than the sum of its proper divisors (27296519).

165433081 is a wasteful number, since it uses less digits than its factorization.

165433081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 165433081 is about 12862.0791865079. The cubic root of 165433081 is about 548.9601078287.

The spelling of 165433081 in words is "one hundred sixty-five million, four hundred thirty-three thousand, eighty-one".