22245551 has 8 divisors (see below), whose sum is σ = 22550400. Its totient is φ = 21943072.

The previous prime is 22245533. The next prime is 22245557. The reversal of 22245551 is 15554222.

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

It is a cyclic number.

It is not a de Polignac number, because 22245551 - 2¹⁸ = 21983407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22245551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25346 + ... + 26208.

It is an arithmetic number, because the mean of its divisors is an integer number (2818800).

Almost surely, 2^22245551 is an apocalyptic number.

22245551 is a deficient number, since it is larger than the sum of its proper divisors (304849).

22245551 is a wasteful number, since it uses less digits than its factorization.

22245551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185.

The product of its digits is 4000, while the sum is 26.

The square root of 22245551 is about 4716.5189493948. The cubic root of 22245551 is about 281.2425686267.

Adding to 22245551 its reverse (15554222), we get a palindrome (37799773).

The spelling of 22245551 in words is "twenty-two million, two hundred forty-five thousand, five hundred fifty-one".