23218401 has 8 divisors (see below), whose sum is σ = 31031424. Its totient is φ = 15442160.

The previous prime is 23218397. The next prime is 23218427. The reversal of 23218401 is 10481232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23218401 - 2² = 23218397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23218441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7686 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (3878928).

Almost surely, 2^23218401 is an apocalyptic number.

It is an amenable number.

23218401 is a deficient number, since it is larger than the sum of its proper divisors (7813023).

23218401 is a wasteful number, since it uses less digits than its factorization.

23218401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18391.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 23218401 is about 4818.5476027533. The cubic root of 23218401 is about 285.2840135821.

Adding to 23218401 its reverse (10481232), we get a palindrome (33699633).

The spelling of 23218401 in words is "twenty-three million, two hundred eighteen thousand, four hundred one".