21225002 has 8 divisors (see below), whose sum is σ = 32088576. Its totient is φ = 10528812.

The previous prime is 21224989. The next prime is 21225037. The reversal of 21225002 is 20052212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41528 + ... + 42035.

It is an arithmetic number, because the mean of its divisors is an integer number (4011072).

Almost surely, 2^21225002 is an apocalyptic number.

21225002 is a deficient number, since it is larger than the sum of its proper divisors (10863574).

21225002 is a wasteful number, since it uses less digits than its factorization.

21225002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83692.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 21225002 is about 4607.0600169739. The cubic root of 21225002 is about 276.8742581598.

Adding to 21225002 its reverse (20052212), we get a palindrome (41277214).

The spelling of 21225002 in words is "twenty-one million, two hundred twenty-five thousand, two".