23391451 has 4 divisors (see below), whose sum is σ = 24622600. Its totient is φ = 22160304.

The previous prime is 23391427. The next prime is 23391457. The reversal of 23391451 is 15419332.

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-23391451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23391457) 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, 615546 + ... + 615583.

It is an arithmetic number, because the mean of its divisors is an integer number (6155650).

Almost surely, 2^23391451 is an apocalyptic number.

23391451 is a deficient number, since it is larger than the sum of its proper divisors (1231149).

23391451 is a wasteful number, since it uses less digits than its factorization.

23391451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231148.

The product of its digits is 3240, while the sum is 28.

The square root of 23391451 is about 4836.4709241347. The cubic root of 23391451 is about 285.9910139482.

The spelling of 23391451 in words is "twenty-three million, three hundred ninety-one thousand, four hundred fifty-one".