165812057 has 2 divisors, whose sum is σ = 165812058. Its totient is φ = 165812056.

The previous prime is 165812041. The next prime is 165812081. The reversal of 165812057 is 750218561.

165812057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155027401 + 10784656 = 12451^2 + 3284^2 .

It is a cyclic number.

It is not a de Polignac number, because 165812057 - 2⁴ = 165812041 is a prime.

It is not a weakly prime, because it can be changed into another prime (165815057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82906028 + 82906029.

It is an arithmetic number, because the mean of its divisors is an integer number (82906029).

Almost surely, 2^165812057 is an apocalyptic number.

It is an amenable number.

165812057 is a deficient number, since it is larger than the sum of its proper divisors (1).

165812057 is an equidigital number, since it uses as much as digits as its factorization.

165812057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 165812057 is about 12876.8030582129. The cubic root of 165812057 is about 549.3789761797.

The spelling of 165812057 in words is "one hundred sixty-five million, eight hundred twelve thousand, fifty-seven".