161433263 has 4 divisors (see below), whose sum is σ = 164169480. Its totient is φ = 158697048.

The previous prime is 161433247. The next prime is 161433313. The reversal of 161433263 is 362334161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161433263 - 2⁴ = 161433247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161433163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368020 + ... + 1368137.

It is an arithmetic number, because the mean of its divisors is an integer number (41042370).

Almost surely, 2^161433263 is an apocalyptic number.

161433263 is a deficient number, since it is larger than the sum of its proper divisors (2736217).

161433263 is an equidigital number, since it uses as much as digits as its factorization.

161433263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736216.

The product of its digits is 7776, while the sum is 29.

The square root of 161433263 is about 12705.6390236776. The cubic root of 161433263 is about 544.4997378970.

The spelling of 161433263 in words is "one hundred sixty-one million, four hundred thirty-three thousand, two hundred sixty-three".