23109451 has 4 divisors (see below), whose sum is σ = 23125392. Its totient is φ = 23093512.

The previous prime is 23109421. The next prime is 23109481. The reversal of 23109451 is 15490132.

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 (23109421) and next prime (23109481).

It is a cyclic number.

It is not a de Polignac number, because 23109451 - 2⁵ = 23109419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23109421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5551 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (5781348).

Almost surely, 2^23109451 is an apocalyptic number.

23109451 is a deficient number, since it is larger than the sum of its proper divisors (15941).

23109451 is a wasteful number, since it uses less digits than its factorization.

23109451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15940.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 23109451 is about 4807.2290355256. The cubic root of 23109451 is about 284.8370916728.

Adding to 23109451 its reverse (15490132), we get a palindrome (38599583).

The spelling of 23109451 in words is "twenty-three million, one hundred nine thousand, four hundred fifty-one".