23205553 has 4 divisors (see below), whose sum is σ = 26520640. Its totient is φ = 19890468.

The previous prime is 23205541. The next prime is 23205557. The reversal of 23205553 is 35550232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23205553 - 2⁵ = 23205521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23205557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657533 + ... + 1657546.

It is an arithmetic number, because the mean of its divisors is an integer number (6630160).

Almost surely, 2^23205553 is an apocalyptic number.

It is an amenable number.

23205553 is a deficient number, since it is larger than the sum of its proper divisors (3315087).

23205553 is an equidigital number, since it uses as much as digits as its factorization.

23205553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315086.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 23205553 is about 4817.2142364649. The cubic root of 23205553 is about 285.2313828362.

Adding to 23205553 its reverse (35550232), we get a palindrome (58755785).

The spelling of 23205553 in words is "twenty-three million, two hundred five thousand, five hundred fifty-three".