22551345 has 16 divisors (see below), whose sum is σ = 40091520. Its totient is φ = 12027312.

The previous prime is 22551343. The next prime is 22551359. The reversal of 22551345 is 54315522.

It is a happy number.

It is not a de Polignac number, because 22551345 - 2¹ = 22551343 is a prime.

It is a super-2 number, since 2×22551345² = 1017126322618050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22551343) 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 15 ways as a sum of consecutive naturals, for example, 83389 + ... + 83658.

It is an arithmetic number, because the mean of its divisors is an integer number (2505720).

Almost surely, 2^22551345 is an apocalyptic number.

It is an amenable number.

22551345 is a deficient number, since it is larger than the sum of its proper divisors (17540175).

22551345 is a wasteful number, since it uses less digits than its factorization.

22551345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167061 (or 167055 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 22551345 is about 4748.8256443041. The cubic root of 22551345 is about 282.5253899440.

Adding to 22551345 its reverse (54315522), we get a palindrome (76866867).

It can be divided in two parts, 2255 and 1345, that added together give a square (3600 = 60²).

The spelling of 22551345 in words is "twenty-two million, five hundred fifty-one thousand, three hundred forty-five".