23457505 has 4 divisors (see below), whose sum is σ = 28149012. Its totient is φ = 18766000.

The previous prime is 23457487. The next prime is 23457509. The reversal of 23457505 is 50575432.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6185169 + 17272336 = 2487^2 + 4156^2 .

It is not a de Polignac number, because 23457505 - 2¹⁹ = 22933217 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23457509) 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, 2345746 + ... + 2345755.

It is an arithmetic number, because the mean of its divisors is an integer number (7037253).

Almost surely, 2^23457505 is an apocalyptic number.

It is an amenable number.

23457505 is a deficient number, since it is larger than the sum of its proper divisors (4691507).

23457505 is an equidigital number, since it uses as much as digits as its factorization.

23457505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691506.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 23457505 is about 4843.2948495833. The cubic root of 23457505 is about 286.2599597356.

The spelling of 23457505 in words is "twenty-three million, four hundred fifty-seven thousand, five hundred five".