22102251 has 8 divisors (see below), whose sum is σ = 29682240. Its totient is φ = 14628552.

The previous prime is 22102247. The next prime is 22102253. The reversal of 22102251 is 15220122.

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

It is not a de Polignac number, because 22102251 - 2² = 22102247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22102251.

It is not an unprimeable number, because it can be changed into a prime (22102253) 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, 26085 + ... + 26918.

It is an arithmetic number, because the mean of its divisors is an integer number (3710280).

Almost surely, 2^22102251 is an apocalyptic number.

22102251 is a deficient number, since it is larger than the sum of its proper divisors (7579989).

22102251 is a wasteful number, since it uses less digits than its factorization.

22102251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53145.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 22102251 is about 4701.3031172219. The cubic root of 22102251 is about 280.6373703176.

Adding to 22102251 its reverse (15220122), we get a palindrome (37322373).

The spelling of 22102251 in words is "twenty-two million, one hundred two thousand, two hundred fifty-one".