23423557 has 4 divisors (see below), whose sum is σ = 23478336. Its totient is φ = 23368780.

The previous prime is 23423551. The next prime is 23423563. The reversal of 23423557 is 75532432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23423551) and next prime (23423563).

It is a cyclic number.

It is not a de Polignac number, because 23423557 - 2³ = 23423549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23423551) 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, 26743 + ... + 27604.

It is an arithmetic number, because the mean of its divisors is an integer number (5869584).

Almost surely, 2^23423557 is an apocalyptic number.

It is an amenable number.

23423557 is a deficient number, since it is larger than the sum of its proper divisors (54779).

23423557 is an equidigital number, since it uses as much as digits as its factorization.

23423557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54778.

The product of its digits is 25200, while the sum is 31.

The square root of 23423557 is about 4839.7889416792. The cubic root of 23423557 is about 286.1218000454.

Adding to 23423557 its reverse (75532432), we get a palindrome (98955989).

The spelling of 23423557 in words is "twenty-three million, four hundred twenty-three thousand, five hundred fifty-seven".