163423231 has 2 divisors, whose sum is σ = 163423232. Its totient is φ = 163423230.

The previous prime is 163423213. The next prime is 163423279. The reversal of 163423231 is 132324361.

Together with previous prime (163423213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163423231 - 2¹⁵ = 163390463 is a prime.

It is a super-2 number, since 2×163423231² = 53414304860958722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163423196 and 163423205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163423201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81711615 + 81711616.

It is an arithmetic number, because the mean of its divisors is an integer number (81711616).

Almost surely, 2^163423231 is an apocalyptic number.

163423231 is a deficient number, since it is larger than the sum of its proper divisors (1).

163423231 is an equidigital number, since it uses as much as digits as its factorization.

163423231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

The square root of 163423231 is about 12783.7095946364. The cubic root of 163423231 is about 546.7279343801.

Adding to 163423231 its reverse (132324361), we get a palindrome (295747592).

The spelling of 163423231 in words is "one hundred sixty-three million, four hundred twenty-three thousand, two hundred thirty-one".