21035222 has 16 divisors (see below), whose sum is σ = 35979552. Its totient is φ = 9137280.

The previous prime is 21035219. The next prime is 21035227. The reversal of 21035222 is 22253012.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21035222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035227) 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, 23354 + ... + 24237.

It is an arithmetic number, because the mean of its divisors is an integer number (2248722).

Almost surely, 2^21035222 is an apocalyptic number.

21035222 is a deficient number, since it is larger than the sum of its proper divisors (14944330).

21035222 is a wasteful number, since it uses less digits than its factorization.

21035222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47623.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21035222 is about 4586.4171201495. The cubic root of 21035222 is about 276.0465772404.

Adding to 21035222 its reverse (22253012), we get a palindrome (43288234).

The spelling of 21035222 in words is "twenty-one million, thirty-five thousand, two hundred twenty-two".