22225251 has 8 divisors (see below), whose sum is σ = 29709904. Its totient is φ = 14778720.

The previous prime is 22225211. The next prime is 22225277. The reversal of 22225251 is 15252222.

22225251 = 9² + 10² + ... + 405².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22225251 - 2¹⁷ = 22094179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22225211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8140 + ... + 10521.

It is an arithmetic number, because the mean of its divisors is an integer number (3713738).

Almost surely, 2^22225251 is an apocalyptic number.

22225251 is a deficient number, since it is larger than the sum of its proper divisors (7484653).

22225251 is a wasteful number, since it uses less digits than its factorization.

22225251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19061.

The product of its digits is 800, while the sum is 21.

The square root of 22225251 is about 4714.3664473607. The cubic root of 22225251 is about 281.1569940376.

Adding to 22225251 its reverse (15252222), we get a palindrome (37477473).

The spelling of 22225251 in words is "twenty-two million, two hundred twenty-five thousand, two hundred fifty-one".