163825513 has 2 divisors, whose sum is σ = 163825514. Its totient is φ = 163825512.

The previous prime is 163825511. The next prime is 163825523. The reversal of 163825513 is 315528361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129345129 + 34480384 = 11373^2 + 5872^2 .

It is an emirp because it is prime and its reverse (315528361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163825513 - 2¹ = 163825511 is a prime.

Together with 163825511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (163825511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81912756 + 81912757.

It is an arithmetic number, because the mean of its divisors is an integer number (81912757).

Almost surely, 2^163825513 is an apocalyptic number.

It is an amenable number.

163825513 is a deficient number, since it is larger than the sum of its proper divisors (1).

163825513 is an equidigital number, since it uses as much as digits as its factorization.

163825513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 163825513 is about 12799.4340890525. The cubic root of 163825513 is about 547.1761745826.

The spelling of 163825513 in words is "one hundred sixty-three million, eight hundred twenty-five thousand, five hundred thirteen".