21822112 has 24 divisors (see below), whose sum is σ = 46267956. Its totient is φ = 10071552.

The previous prime is 21822103. The next prime is 21822121. The reversal of 21822112 is 21122812.

It is an interprime number because it is at equal distance from previous prime (21822103) and next prime (21822121).

It can be written as a sum of positive squares in 2 ways, for example, as 21123216 + 698896 = 4596^2 + 836^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21822112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25813 + ... + 26644.

Almost surely, 2^21822112 is an apocalyptic number.

It is an amenable number.

21822112 is an abundant number, since it is smaller than the sum of its proper divisors (24445844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21822112 is a wasteful number, since it uses less digits than its factorization.

21822112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52480 (or 52472 counting only the distinct ones).

The product of its digits is 128, while the sum is 19.

The square root of 21822112 is about 4671.4143468547. The cubic root of 21822112 is about 279.4466623131.

Adding to 21822112 its reverse (21122812), we get a palindrome (42944924).

The spelling of 21822112 in words is "twenty-one million, eight hundred twenty-two thousand, one hundred twelve".