23432551 has 4 divisors (see below), whose sum is σ = 24240600. Its totient is φ = 22624504.

The previous prime is 23432537. The next prime is 23432569. The reversal of 23432551 is 15523432.

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-23432551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23430551) 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, 403981 + ... + 404038.

It is an arithmetic number, because the mean of its divisors is an integer number (6060150).

Almost surely, 2^23432551 is an apocalyptic number.

23432551 is a deficient number, since it is larger than the sum of its proper divisors (808049).

23432551 is an equidigital number, since it uses as much as digits as its factorization.

23432551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808048.

The product of its digits is 3600, while the sum is 25.

The square root of 23432551 is about 4840.7180252520. The cubic root of 23432551 is about 286.1584163198.

Adding to 23432551 its reverse (15523432), we get a palindrome (38955983).

The spelling of 23432551 in words is "twenty-three million, four hundred thirty-two thousand, five hundred fifty-one".