163315231 has 2 divisors, whose sum is σ = 163315232. Its totient is φ = 163315230.

The previous prime is 163315189. The next prime is 163315289. The reversal of 163315231 is 132513361.

It is a weak prime.

It is an emirp because it is prime and its reverse (132513361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163315231 is a prime.

It is a super-2 number, since 2×163315231² = 53343729353166722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163315196 and 163315205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163315331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81657615 + 81657616.

It is an arithmetic number, because the mean of its divisors is an integer number (81657616).

Almost surely, 2^163315231 is an apocalyptic number.

163315231 is a deficient number, since it is larger than the sum of its proper divisors (1).

163315231 is an equidigital number, since it uses as much as digits as its factorization.

163315231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 163315231 is about 12779.4847705219. The cubic root of 163315231 is about 546.6074708276.

Adding to 163315231 its reverse (132513361), we get a palindrome (295828592).

The spelling of 163315231 in words is "one hundred sixty-three million, three hundred fifteen thousand, two hundred thirty-one".