165230305604381 has 2 divisors, whose sum is σ = 165230305604382. Its totient is φ = 165230305604380.

The previous prime is 165230305604339. The next prime is 165230305604383. The reversal of 165230305604381 is 183406503032561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99613274616025 + 65617030988356 = 9980645^2 + 8100434^2 .

It is a cyclic number.

It is not a de Polignac number, because 165230305604381 - 2¹⁰ = 165230305603357 is a prime.

It is a super-2 number, since 2×165230305604381² (a number of 29 digits) contains 22 as substring.

Together with 165230305604383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165230305604383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82615152802190 + 82615152802191.

It is an arithmetic number, because the mean of its divisors is an integer number (82615152802191).

Almost surely, 2^{165230305604381} is an apocalyptic number.

It is an amenable number.

165230305604381 is a deficient number, since it is larger than the sum of its proper divisors (1).

165230305604381 is an equidigital number, since it uses as much as digits as its factorization.

165230305604381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 165230305604381 in words is "one hundred sixty-five trillion, two hundred thirty billion, three hundred five million, six hundred four thousand, three hundred eighty-one".