21952226 has 4 divisors (see below), whose sum is σ = 32928342. Its totient is φ = 10976112.

The previous prime is 21952207. The next prime is 21952291. The reversal of 21952226 is 62225912.

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., 11055625 + 10896601 = 3325^2 + 3301^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5488055 + ... + 5488058.

Almost surely, 2^21952226 is an apocalyptic number.

21952226 is a deficient number, since it is larger than the sum of its proper divisors (10976116).

21952226 is a wasteful number, since it uses less digits than its factorization.

21952226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976115.

The product of its digits is 4320, while the sum is 29.

The square root of 21952226 is about 4685.3202665346. The cubic root of 21952226 is about 280.0009608811. Note that the first 3 decimals are identical.

The spelling of 21952226 in words is "twenty-one million, nine hundred fifty-two thousand, two hundred twenty-six".