24218561 has 4 divisors (see below), whose sum is σ = 24265392. Its totient is φ = 24171732.

The previous prime is 24218549. The next prime is 24218569. The reversal of 24218561 is 16581242.

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 a de Polignac number, because none of the positive numbers 2^k-24218561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24218569) 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, 22631 + ... + 23676.

It is an arithmetic number, because the mean of its divisors is an integer number (6066348).

Almost surely, 2^24218561 is an apocalyptic number.

It is an amenable number.

24218561 is a deficient number, since it is larger than the sum of its proper divisors (46831).

24218561 is an equidigital number, since it uses as much as digits as its factorization.

24218561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46830.

The product of its digits is 3840, while the sum is 29.

The square root of 24218561 is about 4921.2357188007. The cubic root of 24218561 is about 289.3228791990.

The spelling of 24218561 in words is "twenty-four million, two hundred eighteen thousand, five hundred sixty-one".