21332230 has 16 divisors (see below), whose sum is σ = 38483424. Its totient is φ = 8513920.

The previous prime is 21332221. The next prime is 21332251. The reversal of 21332230 is 3223312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2910 + ... + 7150.

It is an arithmetic number, because the mean of its divisors is an integer number (2405214).

Almost surely, 2^21332230 is an apocalyptic number.

21332230 is a deficient number, since it is larger than the sum of its proper divisors (17151194).

21332230 is a wasteful number, since it uses less digits than its factorization.

21332230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21332230 is about 4618.6827126357. The cubic root of 21332230 is about 277.3397283540.

Adding to 21332230 its reverse (3223312), we get a palindrome (24555542).

The spelling of 21332230 in words is "twenty-one million, three hundred thirty-two thousand, two hundred thirty".