23543431 has 4 divisors (see below), whose sum is σ = 23772112. Its totient is φ = 23314752.

The previous prime is 23543423. The next prime is 23543483. The reversal of 23543431 is 13434532.

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

It is a cyclic number.

It is not a de Polignac number, because 23543431 - 2³ = 23543423 is a prime.

It is a super-2 number, since 2×23543431² = 1108586286503522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23543396 and 23543405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23543411) 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, 114186 + ... + 114391.

It is an arithmetic number, because the mean of its divisors is an integer number (5943028).

Almost surely, 2^23543431 is an apocalyptic number.

23543431 is a deficient number, since it is larger than the sum of its proper divisors (228681).

23543431 is a wasteful number, since it uses less digits than its factorization.

23543431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228680.

The product of its digits is 4320, while the sum is 25.

The square root of 23543431 is about 4852.1573552390. The cubic root of 23543431 is about 286.6090619485.

Adding to 23543431 its reverse (13434532), we get a palindrome (36977963).

The spelling of 23543431 in words is "twenty-three million, five hundred forty-three thousand, four hundred thirty-one".