23454221 has 16 divisors (see below), whose sum is σ = 27861504. Its totient is φ = 19326384.

The previous prime is 23454217. The next prime is 23454251. The reversal of 23454221 is 12245432.

It is a happy number.

It is not a de Polignac number, because 23454221 - 2² = 23454217 is a prime.

It is a Duffinian number.

23454221 is a modest number, since divided by 4221 gives 2345 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23454251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19586 + ... + 20748.

It is an arithmetic number, because the mean of its divisors is an integer number (1741344).

Almost surely, 2^23454221 is an apocalyptic number.

It is an amenable number.

23454221 is a deficient number, since it is larger than the sum of its proper divisors (4407283).

23454221 is a wasteful number, since it uses less digits than its factorization.

23454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280.

The product of its digits is 1920, while the sum is 23.

The square root of 23454221 is about 4842.9558123113. The cubic root of 23454221 is about 286.2466005203.

Adding to 23454221 its reverse (12245432), we get a palindrome (35699653).

The spelling of 23454221 in words is "twenty-three million, four hundred fifty-four thousand, two hundred twenty-one".