23523553 has 4 divisors (see below), whose sum is σ = 24334740. Its totient is φ = 22712368.

The previous prime is 23523551. The next prime is 23523557. The reversal of 23523553 is 35532532.

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 11641744 + 11881809 = 3412^2 + 3447^2 .

It is a cyclic number.

It is not a de Polignac number, because 23523553 - 2¹ = 23523551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23523551) 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, 405550 + ... + 405607.

It is an arithmetic number, because the mean of its divisors is an integer number (6083685).

Almost surely, 2^23523553 is an apocalyptic number.

It is an amenable number.

23523553 is a deficient number, since it is larger than the sum of its proper divisors (811187).

23523553 is an equidigital number, since it uses as much as digits as its factorization.

23523553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811186.

The product of its digits is 13500, while the sum is 28.

The square root of 23523553 is about 4850.1085554862. The cubic root of 23523553 is about 286.5283767517.

The spelling of 23523553 in words is "twenty-three million, five hundred twenty-three thousand, five hundred fifty-three".