21412233 has 12 divisors (see below), whose sum is σ = 31765188. Its totient is φ = 13888800.

The previous prime is 21412219. The next prime is 21412267. The reversal of 21412233 is 33221412.

21412233 is a `hidden beast` number, since 21 + 412 + 233 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13860729 + 7551504 = 3723^2 + 2748^2 .

It is not a de Polignac number, because 21412233 - 2⁴ = 21412217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31818 + ... + 32483.

It is an arithmetic number, because the mean of its divisors is an integer number (2647099).

Almost surely, 2^21412233 is an apocalyptic number.

It is an amenable number.

21412233 is a deficient number, since it is larger than the sum of its proper divisors (10352955).

21412233 is a wasteful number, since it uses less digits than its factorization.

21412233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64344 (or 64341 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 21412233 is about 4627.3354103631. The cubic root of 21412233 is about 277.6860014261.

Adding to 21412233 its reverse (33221412), we get a palindrome (54633645).

The spelling of 21412233 in words is "twenty-one million, four hundred twelve thousand, two hundred thirty-three".