165361051 has 2 divisors, whose sum is σ = 165361052. Its totient is φ = 165361050.

The previous prime is 165361043. The next prime is 165361061. The reversal of 165361051 is 150163561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165361051 - 2³ = 165361043 is a prime.

It is not a weakly prime, because it can be changed into another prime (165361061) 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 as a sum of consecutive naturals, namely, 82680525 + 82680526.

It is an arithmetic number, because the mean of its divisors is an integer number (82680526).

Almost surely, 2^165361051 is an apocalyptic number.

165361051 is a deficient number, since it is larger than the sum of its proper divisors (1).

165361051 is an equidigital number, since it uses as much as digits as its factorization.

165361051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 165361051 is about 12859.2787900411. The cubic root of 165361051 is about 548.8804233695.

The spelling of 165361051 in words is "one hundred sixty-five million, three hundred sixty-one thousand, fifty-one".