165130302521 has 2 divisors, whose sum is σ = 165130302522. Its totient is φ = 165130302520.

The previous prime is 165130302509. The next prime is 165130302523. The reversal of 165130302521 is 125203031561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129214367296 + 35915935225 = 359464^2 + 189515^2 .

It is a cyclic number.

It is not a de Polignac number, because 165130302521 - 2²⁶ = 165063193657 is a prime.

Together with 165130302523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165130302523) 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, 82565151260 + 82565151261.

It is an arithmetic number, because the mean of its divisors is an integer number (82565151261).

Almost surely, 2^165130302521 is an apocalyptic number.

It is an amenable number.

165130302521 is a deficient number, since it is larger than the sum of its proper divisors (1).

165130302521 is an equidigital number, since it uses as much as digits as its factorization.

165130302521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 165130302521 in words is "one hundred sixty-five billion, one hundred thirty million, three hundred two thousand, five hundred twenty-one".