161233441 has 4 divisors (see below), whose sum is σ = 161422000. Its totient is φ = 161044884.

The previous prime is 161233439. The next prime is 161233447. The reversal of 161233441 is 144332161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161233441 - 2¹ = 161233439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161233447) 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, 92991 + ... + 94708.

It is an arithmetic number, because the mean of its divisors is an integer number (40355500).

Almost surely, 2^161233441 is an apocalyptic number.

It is an amenable number.

161233441 is a deficient number, since it is larger than the sum of its proper divisors (188559).

161233441 is an equidigital number, since it uses as much as digits as its factorization.

161233441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188558.

The product of its digits is 1728, while the sum is 25.

The square root of 161233441 is about 12697.7730724722. The cubic root of 161233441 is about 544.2749846509.

It can be divided in two parts, 1612 and 33441, that added together give a palindrome (35053).

The spelling of 161233441 in words is "one hundred sixty-one million, two hundred thirty-three thousand, four hundred forty-one".