163952281 has 2 divisors, whose sum is σ = 163952282. Its totient is φ = 163952280.

The previous prime is 163952263. The next prime is 163952293. The reversal of 163952281 is 182259361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161518681 + 2433600 = 12709^2 + 1560^2 .

It is an emirp because it is prime and its reverse (182259361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163952281 - 2⁹ = 163951769 is a prime.

It is a super-2 number, since 2×163952281² = 53760700890205922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163952281.

It is not a weakly prime, because it can be changed into another prime (163952221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81976140 + 81976141.

It is an arithmetic number, because the mean of its divisors is an integer number (81976141).

Almost surely, 2^163952281 is an apocalyptic number.

It is an amenable number.

163952281 is a deficient number, since it is larger than the sum of its proper divisors (1).

163952281 is an equidigital number, since it uses as much as digits as its factorization.

163952281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 163952281 is about 12804.3852253827. The cubic root of 163952281 is about 547.3172729669.

The spelling of 163952281 in words is "one hundred sixty-three million, nine hundred fifty-two thousand, two hundred eighty-one".