233645423 has 16 divisors (see below), whose sum is σ = 259238400. Its totient is φ = 208802880.

The previous prime is 233645393. The next prime is 233645473. The reversal of 233645423 is 324546332.

It is a de Polignac number, because none of the positive numbers 2^k-233645423 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 233645423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233645473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271568 + ... + 272426.

It is an arithmetic number, because the mean of its divisors is an integer number (16202400).

Almost surely, 2^233645423 is an apocalyptic number.

233645423 is a deficient number, since it is larger than the sum of its proper divisors (25592977).

233645423 is a wasteful number, since it uses less digits than its factorization.

233645423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262.

The product of its digits is 51840, while the sum is 32.

The square root of 233645423 is about 15285.4644352077. The cubic root of 233645423 is about 615.9126054896.

Subtracting 233645423 from its reverse (324546332), we obtain a palindrome (90900909).

The spelling of 233645423 in words is "two hundred thirty-three million, six hundred forty-five thousand, four hundred twenty-three".