21234583 has 8 divisors (see below), whose sum is σ = 22183200. Its totient is φ = 20300448.

The previous prime is 21234541. The next prime is 21234593. The reversal of 21234583 is 38543212.

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 21234583 - 2²¹ = 19137431 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234523) 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, 568 + ... + 6541.

It is an arithmetic number, because the mean of its divisors is an integer number (2772900).

Almost surely, 2^21234583 is an apocalyptic number.

21234583 is a deficient number, since it is larger than the sum of its proper divisors (948617).

21234583 is a wasteful number, since it uses less digits than its factorization.

21234583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7241.

The product of its digits is 5760, while the sum is 28.

The square root of 21234583 is about 4608.0997168030. The cubic root of 21234583 is about 276.9159123878.

Adding to 21234583 its reverse (38543212), we get a palindrome (59777795).

The spelling of 21234583 in words is "twenty-one million, two hundred thirty-four thousand, five hundred eighty-three".