21227302 has 16 divisors (see below), whose sum is σ = 32344272. Its totient is φ = 10447360.

The previous prime is 21227291. The next prime is 21227303. The reversal of 21227302 is 20372212.

It is a self number, because there is not a number n which added to its sum of digits gives 21227302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227303) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 59958 + ... + 60310.

It is an arithmetic number, because the mean of its divisors is an integer number (2021517).

Almost surely, 2^21227302 is an apocalyptic number.

21227302 is a deficient number, since it is larger than the sum of its proper divisors (11116970).

21227302 is a wasteful number, since it uses less digits than its factorization.

21227302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 21227302 is about 4607.3096271034. The cubic root of 21227302 is about 276.8842587524.

Adding to 21227302 its reverse (20372212), we get a palindrome (41599514).

The spelling of 21227302 in words is "twenty-one million, two hundred twenty-seven thousand, three hundred two".