23043551 has 4 divisors (see below), whose sum is σ = 24399072. Its totient is φ = 21688032.

The previous prime is 23043533. The next prime is 23043569. The reversal of 23043551 is 15534032.

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

It is an interprime number because it is at equal distance from previous prime (23043533) and next prime (23043569).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23043551 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 (23043151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677735 + ... + 677768.

It is an arithmetic number, because the mean of its divisors is an integer number (6099768).

Almost surely, 2^23043551 is an apocalyptic number.

23043551 is a deficient number, since it is larger than the sum of its proper divisors (1355521).

23043551 is a wasteful number, since it uses less digits than its factorization.

23043551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355520.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 23043551 is about 4800.3698815820. The cubic root of 23043551 is about 284.5660822751.

Adding to 23043551 its reverse (15534032), we get a palindrome (38577583).

The spelling of 23043551 in words is "twenty-three million, forty-three thousand, five hundred fifty-one".