23145751 has 4 divisors (see below), whose sum is σ = 24152112. Its totient is φ = 22139392.

The previous prime is 23145713. The next prime is 23145791. The reversal of 23145751 is 15754132.

It is a happy number.

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 23145751 - 2¹⁵ = 23112983 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 (23145791) 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, 503146 + ... + 503191.

It is an arithmetic number, because the mean of its divisors is an integer number (6038028).

Almost surely, 2^23145751 is an apocalyptic number.

23145751 is a deficient number, since it is larger than the sum of its proper divisors (1006361).

23145751 is a wasteful number, since it uses less digits than its factorization.

23145751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006360.

The product of its digits is 4200, while the sum is 28.

The square root of 23145751 is about 4811.0031178539. The cubic root of 23145751 is about 284.9861530156.

Adding to 23145751 its reverse (15754132), we get a palindrome (38899883).

The spelling of 23145751 in words is "twenty-three million, one hundred forty-five thousand, seven hundred fifty-one".