23053561 has 4 divisors (see below), whose sum is σ = 23397712. Its totient is φ = 22709412.

The previous prime is 23053523. The next prime is 23053571. The reversal of 23053561 is 16535032.

It is a happy number.

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 23053561 - 2⁹ = 23053049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23053501) 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, 171975 + ... + 172108.

It is an arithmetic number, because the mean of its divisors is an integer number (5849428).

Almost surely, 2^23053561 is an apocalyptic number.

It is an amenable number.

23053561 is a deficient number, since it is larger than the sum of its proper divisors (344151).

23053561 is an equidigital number, since it uses as much as digits as its factorization.

23053561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344150.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 23053561 is about 4801.4123963684. The cubic root of 23053561 is about 284.6072809908.

Adding to 23053561 its reverse (16535032), we get a palindrome (39588593).

The spelling of 23053561 in words is "twenty-three million, fifty-three thousand, five hundred sixty-one".