161223263 has 2 divisors, whose sum is σ = 161223264. Its totient is φ = 161223262.

The previous prime is 161223259. The next prime is 161223269. The reversal of 161223263 is 362322161.

161223263 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 is a cyclic number.

It is not a de Polignac number, because 161223263 - 2² = 161223259 is a prime.

It is equal to p_9039311 and since 161223263 and 9039311 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161223269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80611631 + 80611632.

It is an arithmetic number, because the mean of its divisors is an integer number (80611632).

Almost surely, 2^161223263 is an apocalyptic number.

161223263 is a deficient number, since it is larger than the sum of its proper divisors (1).

161223263 is an equidigital number, since it uses as much as digits as its factorization.

161223263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 26.

The square root of 161223263 is about 12697.3722872097. The cubic root of 161223263 is about 544.2635318007.

The spelling of 161223263 in words is "one hundred sixty-one million, two hundred twenty-three thousand, two hundred sixty-three".