21225083 has 4 divisors (see below), whose sum is σ = 23154648. Its totient is φ = 19295520.

The previous prime is 21225077. The next prime is 21225097. The reversal of 21225083 is 38052212.

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

It is a cyclic number.

It is not a de Polignac number, because 21225083 - 2¹⁴ = 21208699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21225583) 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, 964766 + ... + 964787.

It is an arithmetic number, because the mean of its divisors is an integer number (5788662).

Almost surely, 2^21225083 is an apocalyptic number.

21225083 is a deficient number, since it is larger than the sum of its proper divisors (1929565).

21225083 is a wasteful number, since it uses less digits than its factorization.

21225083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929564.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 21225083 is about 4607.0688078213. The cubic root of 21225083 is about 276.8746103669.

Adding to 21225083 its reverse (38052212), we get a palindrome (59277295).

The spelling of 21225083 in words is "twenty-one million, two hundred twenty-five thousand, eighty-three".