161200433 has 4 divisors (see below), whose sum is σ = 161615220. Its totient is φ = 160785648.

The previous prime is 161200411. The next prime is 161200439. The reversal of 161200433 is 334002161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334002161 = 2687 ⋅124303.

It can be written as a sum of positive squares in 2 ways, for example, as 34480384 + 126720049 = 5872^2 + 11257^2 .

It is a cyclic number.

It is not a de Polignac number, because 161200433 - 2²⁰ = 160151857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161200439) 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, 206810 + ... + 207587.

It is an arithmetic number, because the mean of its divisors is an integer number (40403805).

Almost surely, 2^161200433 is an apocalyptic number.

It is an amenable number.

161200433 is a deficient number, since it is larger than the sum of its proper divisors (414787).

161200433 is an equidigital number, since it uses as much as digits as its factorization.

161200433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414786.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 161200433 is about 12696.4732504739. The cubic root of 161200433 is about 544.2378404649.

Adding to 161200433 its reverse (334002161), we get a palindrome (495202594).

The spelling of 161200433 in words is "one hundred sixty-one million, two hundred thousand, four hundred thirty-three".