161234233 has 4 divisors (see below), whose sum is σ = 161524260. Its totient is φ = 160944208.

The previous prime is 161234207. The next prime is 161234237. The reversal of 161234233 is 332432161.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103063104 + 58171129 = 10152^2 + 7627^2 .

It is a cyclic number.

It is not a de Polignac number, because 161234233 - 2⁵ = 161234201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161234198 and 161234207.

It is not an unprimeable number, because it can be changed into a prime (161234237) 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, 144178 + ... + 145291.

It is an arithmetic number, because the mean of its divisors is an integer number (40381065).

Almost surely, 2^161234233 is an apocalyptic number.

It is an amenable number.

161234233 is a deficient number, since it is larger than the sum of its proper divisors (290027).

161234233 is an equidigital number, since it uses as much as digits as its factorization.

161234233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290026.

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

The square root of 161234233 is about 12697.8042590048. The cubic root of 161234233 is about 544.2758758331.

Adding to 161234233 its reverse (332432161), we get a palindrome (493666394).

The spelling of 161234233 in words is "one hundred sixty-one million, two hundred thirty-four thousand, two hundred thirty-three".