21882226 has 4 divisors (see below), whose sum is σ = 32823342. Its totient is φ = 10941112.

The previous prime is 21882221. The next prime is 21882229. The reversal of 21882226 is 62228812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 4618201 = 4155^2 + 2149^2 .

It is not an unprimeable number, because it can be changed into a prime (21882221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5470555 + ... + 5470558.

Almost surely, 2^21882226 is an apocalyptic number.

21882226 is a deficient number, since it is larger than the sum of its proper divisors (10941116).

21882226 is a wasteful number, since it uses less digits than its factorization.

21882226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10941115.

The product of its digits is 6144, while the sum is 31.

The square root of 21882226 is about 4677.8441615770. The cubic root of 21882226 is about 279.7030269732.

The spelling of 21882226 in words is "twenty-one million, eight hundred eighty-two thousand, two hundred twenty-six".