23009251 has 4 divisors (see below), whose sum is σ = 23071312. Its totient is φ = 22947192.

The previous prime is 23009219. The next prime is 23009291. The reversal of 23009251 is 15290032.

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 23009251 - 2⁵ = 23009219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23009201) 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, 30471 + ... + 31216.

It is an arithmetic number, because the mean of its divisors is an integer number (5767828).

Almost surely, 2^23009251 is an apocalyptic number.

23009251 is a deficient number, since it is larger than the sum of its proper divisors (62061).

23009251 is an equidigital number, since it uses as much as digits as its factorization.

23009251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62060.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 23009251 is about 4796.7959097714. The cubic root of 23009251 is about 284.4248212996.

Adding to 23009251 its reverse (15290032), we get a palindrome (38299283).

The spelling of 23009251 in words is "twenty-three million, nine thousand, two hundred fifty-one".