22245511 has 4 divisors (see below), whose sum is σ = 22255992. Its totient is φ = 22235032.

The previous prime is 22245497. The next prime is 22245521. The reversal of 22245511 is 11554222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11554222 = 2 ⋅5777111.

It is a cyclic number.

It is not a de Polignac number, because 22245511 - 2⁵ = 22245479 is a prime.

It is a super-2 number, since 2×22245511² = 989725519302242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805 + ... + 6718.

It is an arithmetic number, because the mean of its divisors is an integer number (5563998).

Almost surely, 2^22245511 is an apocalyptic number.

22245511 is a deficient number, since it is larger than the sum of its proper divisors (10481).

22245511 is an equidigital number, since it uses as much as digits as its factorization.

22245511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10480.

The product of its digits is 800, while the sum is 22.

The square root of 22245511 is about 4716.5147089774. The cubic root of 22245511 is about 281.2424000580.

Adding to 22245511 its reverse (11554222), we get a palindrome (33799733).

The spelling of 22245511 in words is "twenty-two million, two hundred forty-five thousand, five hundred eleven".