165312061 has 2 divisors, whose sum is σ = 165312062. Its totient is φ = 165312060.

The previous prime is 165312011. The next prime is 165312079. The reversal of 165312061 is 160213561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163686436 + 1625625 = 12794^2 + 1275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165312061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165312011) 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, 82656030 + 82656031.

It is an arithmetic number, because the mean of its divisors is an integer number (82656031).

Almost surely, 2^165312061 is an apocalyptic number.

It is an amenable number.

165312061 is a deficient number, since it is larger than the sum of its proper divisors (1).

165312061 is an equidigital number, since it uses as much as digits as its factorization.

165312061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 165312061 is about 12857.3737987196. The cubic root of 165312061 is about 548.8262140950.

The spelling of 165312061 in words is "one hundred sixty-five million, three hundred twelve thousand, sixty-one".