233134440423 has 4 divisors (see below), whose sum is σ = 310845920568. Its totient is φ = 155422960280.

The previous prime is 233134440379. The next prime is 233134440443. The reversal of 233134440423 is 324044431332.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233134440423 is a prime.

It is a super-2 number, since 2×233134440423² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233134440443) 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, 38855740068 + ... + 38855740073.

It is an arithmetic number, because the mean of its divisors is an integer number (77711480142).

Almost surely, 2^233134440423 is an apocalyptic number.

233134440423 is a deficient number, since it is larger than the sum of its proper divisors (77711480145).

233134440423 is an equidigital number, since it uses as much as digits as its factorization.

233134440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77711480144.

The product of its (nonzero) digits is 82944, while the sum is 33.

Adding to 233134440423 its reverse (324044431332), we get a palindrome (557178871755).

Subtracting 233134440423 from its reverse (324044431332), we obtain a palindrome (90909990909).

The spelling of 233134440423 in words is "two hundred thirty-three billion, one hundred thirty-four million, four hundred forty thousand, four hundred twenty-three".