165802231 has 12 divisors (see below), whose sum is σ = 193287000. Its totient is φ = 141810480.

The previous prime is 165802201. The next prime is 165802243. The reversal of 165802231 is 132208561.

It is not a de Polignac number, because 165802231 - 2⁷ = 165802103 is a prime.

It is a super-2 number, since 2×165802231² = 54980759609154722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165802231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165802201) 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 11 ways as a sum of consecutive naturals, for example, 21061 + ... + 27841.

It is an arithmetic number, because the mean of its divisors is an integer number (16107250).

Almost surely, 2^165802231 is an apocalyptic number.

165802231 is a deficient number, since it is larger than the sum of its proper divisors (27484769).

165802231 is an equidigital number, since it uses as much as digits as its factorization.

165802231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294 (or 7287 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 165802231 is about 12876.4215137592. The cubic root of 165802231 is about 549.3681239241.

The spelling of 165802231 in words is "one hundred sixty-five million, eight hundred two thousand, two hundred thirty-one".