23985221 has 4 divisors (see below), whose sum is σ = 25830252. Its totient is φ = 22140192.

The previous prime is 23985217. The next prime is 23985223. The reversal of 23985221 is 12258932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2464900 + 21520321 = 1570^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 23985221 - 2² = 23985217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23985223) 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, 922496 + ... + 922521.

It is an arithmetic number, because the mean of its divisors is an integer number (6457563).

Almost surely, 2^23985221 is an apocalyptic number.

It is an amenable number.

23985221 is a deficient number, since it is larger than the sum of its proper divisors (1845031).

23985221 is a wasteful number, since it uses less digits than its factorization.

23985221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845030.

The product of its digits is 8640, while the sum is 32.

The square root of 23985221 is about 4897.4708779124. The cubic root of 23985221 is about 288.3906935529.

The spelling of 23985221 in words is "twenty-three million, nine hundred eighty-five thousand, two hundred twenty-one".