22521051 has 16 divisors (see below), whose sum is σ = 38131200. Its totient is φ = 12869064.

The previous prime is 22521041. The next prime is 22521089. The reversal of 22521051 is 15012522.

It is not a de Polignac number, because 22521051 - 2⁷ = 22520923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22521041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59391 + ... + 59768.

It is an arithmetic number, because the mean of its divisors is an integer number (2383200).

Almost surely, 2^22521051 is an apocalyptic number.

22521051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22521051 is a deficient number, since it is larger than the sum of its proper divisors (15610149).

22521051 is a wasteful number, since it uses less digits than its factorization.

22521051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119175 (or 119169 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 22521051 is about 4745.6349417122. The cubic root of 22521051 is about 282.3988245517.

Adding to 22521051 its reverse (15012522), we get a palindrome (37533573).

The spelling of 22521051 in words is "twenty-two million, five hundred twenty-one thousand, fifty-one".