233144643 has 4 divisors (see below), whose sum is σ = 310859528. Its totient is φ = 155429760.

The previous prime is 233144609. The next prime is 233144669. The reversal of 233144643 is 346441332.

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

It is not a de Polignac number, because 233144643 - 2²¹ = 231047491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 233144643.

It is not an unprimeable number, because it can be changed into a prime (233144683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38857438 + ... + 38857443.

It is an arithmetic number, because the mean of its divisors is an integer number (77714882).

Almost surely, 2^233144643 is an apocalyptic number.

233144643 is a deficient number, since it is larger than the sum of its proper divisors (77714885).

233144643 is an equidigital number, since it uses as much as digits as its factorization.

233144643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77714884.

The product of its digits is 20736, while the sum is 30.

The square root of 233144643 is about 15269.0747263873. The cubic root of 233144643 is about 615.4722554152.

Adding to 233144643 its reverse (346441332), we get a palindrome (579585975).

The spelling of 233144643 in words is "two hundred thirty-three million, one hundred forty-four thousand, six hundred forty-three".