163252681 has 2 divisors, whose sum is σ = 163252682. Its totient is φ = 163252680.

The previous prime is 163252651. The next prime is 163252729. The reversal of 163252681 is 186252361.

163252681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137851081 + 25401600 = 11741^2 + 5040^2 .

It is an emirp because it is prime and its reverse (186252361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163252681 - 2²⁵ = 129698249 is a prime.

It is a super-2 number, since 2×163252681² = 53302875707375522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163252651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81626340 + 81626341.

It is an arithmetic number, because the mean of its divisors is an integer number (81626341).

Almost surely, 2^163252681 is an apocalyptic number.

It is an amenable number.

163252681 is a deficient number, since it is larger than the sum of its proper divisors (1).

163252681 is an equidigital number, since it uses as much as digits as its factorization.

163252681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 163252681 is about 12777.0372543873. The cubic root of 163252681 is about 546.5376780655.

The spelling of 163252681 in words is "one hundred sixty-three million, two hundred fifty-two thousand, six hundred eighty-one".