163325231 has 4 divisors (see below), whose sum is σ = 170426352. Its totient is φ = 156224112.

The previous prime is 163325213. The next prime is 163325249. The reversal of 163325231 is 132523361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132523361 = 83 ⋅1596667.

It is an interprime number because it is at equal distance from previous prime (163325213) and next prime (163325249).

It is a cyclic number.

It is not a de Polignac number, because 163325231 - 2²² = 159130927 is a prime.

It is a super-2 number, since 2×163325231² = 53350262162406722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163325231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163325251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3550526 + ... + 3550571.

It is an arithmetic number, because the mean of its divisors is an integer number (42606588).

Almost surely, 2^163325231 is an apocalyptic number.

163325231 is a deficient number, since it is larger than the sum of its proper divisors (7101121).

163325231 is an equidigital number, since it uses as much as digits as its factorization.

163325231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7101120.

The product of its digits is 3240, while the sum is 26.

The square root of 163325231 is about 12779.8760166130. The cubic root of 163325231 is about 546.6186270909.

Adding to 163325231 its reverse (132523361), we get a palindrome (295848592).

The spelling of 163325231 in words is "one hundred sixty-three million, three hundred twenty-five thousand, two hundred thirty-one".