23261545 has 4 divisors (see below), whose sum is σ = 27913860. Its totient is φ = 18609232.

The previous prime is 23261531. The next prime is 23261549. The reversal of 23261545 is 54516232.

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 17438976 + 5822569 = 4176^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 23261545 - 2¹¹ = 23259497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23261549) 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, 2326150 + ... + 2326159.

It is an arithmetic number, because the mean of its divisors is an integer number (6978465).

Almost surely, 2^23261545 is an apocalyptic number.

It is an amenable number.

23261545 is a deficient number, since it is larger than the sum of its proper divisors (4652315).

23261545 is an equidigital number, since it uses as much as digits as its factorization.

23261545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4652314.

The product of its digits is 7200, while the sum is 28.

The square root of 23261545 is about 4823.0223926497. The cubic root of 23261545 is about 285.4606073918.

Adding to 23261545 its reverse (54516232), we get a palindrome (77777777).

The spelling of 23261545 in words is "twenty-three million, two hundred sixty-one thousand, five hundred forty-five".