165115297 has 2 divisors, whose sum is σ = 165115298. Its totient is φ = 165115296.

The previous prime is 165115289. The next prime is 165115309. The reversal of 165115297 is 792511561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165096801 + 18496 = 12849^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 165115297 - 2³ = 165115289 is a prime.

It is a super-2 number, since 2×165115297² = 54526122606796418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165115267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82557648 + 82557649.

It is an arithmetic number, because the mean of its divisors is an integer number (82557649).

Almost surely, 2^165115297 is an apocalyptic number.

It is an amenable number.

165115297 is a deficient number, since it is larger than the sum of its proper divisors (1).

165115297 is an equidigital number, since it uses as much as digits as its factorization.

165115297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 37.

The square root of 165115297 is about 12849.7197245699. The cubic root of 165115297 is about 548.6083793850.

The spelling of 165115297 in words is "one hundred sixty-five million, one hundred fifteen thousand, two hundred ninety-seven".