23243405 has 4 divisors (see below), whose sum is σ = 27892092. Its totient is φ = 18594720.

The previous prime is 23243387. The next prime is 23243411. The reversal of 23243405 is 50434232.

23243405 is nontrivially palindromic in base 2.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2468041 + 20775364 = 1571^2 + 4558^2 .

It is not a de Polignac number, because 23243405 - 2²⁰ = 22194829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2324336 + ... + 2324345.

It is an arithmetic number, because the mean of its divisors is an integer number (6973023).

Almost surely, 2^23243405 is an apocalyptic number.

It is an amenable number.

23243405 is a deficient number, since it is larger than the sum of its proper divisors (4648687).

23243405 is an equidigital number, since it uses as much as digits as its factorization.

23243405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648686.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 23243405 is about 4821.1414623510. The cubic root of 23243405 is about 285.3863847201.

Adding to 23243405 its reverse (50434232), we get a palindrome (73677637).

The spelling of 23243405 in words is "twenty-three million, two hundred forty-three thousand, four hundred five".