165316253 has 2 divisors, whose sum is σ = 165316254. Its totient is φ = 165316252.

The previous prime is 165316243. The next prime is 165316297. The reversal of 165316253 is 352613561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120934009 + 44382244 = 10997^2 + 6662^2 .

It is a cyclic number.

It is not a de Polignac number, because 165316253 - 2¹² = 165312157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165316243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82658126 + 82658127.

It is an arithmetic number, because the mean of its divisors is an integer number (82658127).

Almost surely, 2^165316253 is an apocalyptic number.

It is an amenable number.

165316253 is a deficient number, since it is larger than the sum of its proper divisors (1).

165316253 is an equidigital number, since it uses as much as digits as its factorization.

165316253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 165316253 is about 12857.5368169801. The cubic root of 165316253 is about 548.8308531193.

The spelling of 165316253 in words is "one hundred sixty-five million, three hundred sixteen thousand, two hundred fifty-three".