22251205 has 8 divisors (see below), whose sum is σ = 26726904. Its totient is φ = 17784000.

The previous prime is 22251197. The next prime is 22251217. The reversal of 22251205 is 50215222.

It can be written as a sum of positive squares in 4 ways, for example, as 516961 + 21734244 = 719^2 + 4662^2 .

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

It is not a de Polignac number, because 22251205 - 2³ = 22251197 is a prime.

It is a super-2 number, since 2×22251205² = 990232247904050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8335 + ... + 10675.

It is an arithmetic number, because the mean of its divisors is an integer number (3340863).

Almost surely, 2^22251205 is an apocalyptic number.

It is an amenable number.

22251205 is a deficient number, since it is larger than the sum of its proper divisors (4475699).

22251205 is a wasteful number, since it uses less digits than its factorization.

22251205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4247.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 22251205 is about 4717.1182940435. The cubic root of 22251205 is about 281.2663937769.

Adding to 22251205 its reverse (50215222), we get a palindrome (72466427).

The spelling of 22251205 in words is "twenty-two million, two hundred fifty-one thousand, two hundred five".