22021005 has 64 divisors (see below), whose sum is σ = 39813120. Its totient is φ = 10348800.

The previous prime is 22020991. The next prime is 22021007. The reversal of 22021005 is 50012022.

22021005 = 50² + 51² + ... + 404².

It is not a de Polignac number, because 22021005 - 2⁶ = 22020941 is a prime.

It is a super-2 number, since 2×22021005² = 969849322420050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 310120 + ... + 310190.

It is an arithmetic number, because the mean of its divisors is an integer number (622080).

Almost surely, 2^22021005 is an apocalyptic number.

It is an amenable number.

22021005 is a deficient number, since it is larger than the sum of its proper divisors (17792115).

22021005 is a wasteful number, since it uses less digits than its factorization.

22021005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 22021005 is about 4692.6543661344. The cubic root of 22021005 is about 280.2930817238.

Adding to 22021005 its reverse (50012022), we get a palindrome (72033027).

The spelling of 22021005 in words is "twenty-two million, twenty-one thousand, five".