161415233 has 8 divisors (see below), whose sum is σ = 190425600. Its totient is φ = 133892640.

The previous prime is 161415229. The next prime is 161415253. The reversal of 161415233 is 332514161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161415233 - 2² = 161415229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161415253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371708 + ... + 372141.

It is an arithmetic number, because the mean of its divisors is an integer number (23803200).

Almost surely, 2^161415233 is an apocalyptic number.

It is an amenable number.

161415233 is a deficient number, since it is larger than the sum of its proper divisors (29010367).

161415233 is an equidigital number, since it uses as much as digits as its factorization.

161415233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743887.

The product of its digits is 2160, while the sum is 26.

The square root of 161415233 is about 12704.9294763883. The cubic root of 161415233 is about 544.4794659580.

Adding to 161415233 its reverse (332514161), we get a palindrome (493929394).

The spelling of 161415233 in words is "one hundred sixty-one million, four hundred fifteen thousand, two hundred thirty-three".