22551668 has 6 divisors (see below), whose sum is σ = 39465426. Its totient is φ = 11275832.

The previous prime is 22551667. The next prime is 22551677. The reversal of 22551668 is 86615522.

It can be written as a sum of positive squares in only one way, i.e., 15272464 + 7279204 = 3908^2 + 2698^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22551667) 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 as a sum of consecutive naturals, namely, 2818955 + ... + 2818962.

It is an arithmetic number, because the mean of its divisors is an integer number (6577571).

Almost surely, 2^22551668 is an apocalyptic number.

It is an amenable number.

22551668 is a deficient number, since it is larger than the sum of its proper divisors (16913758).

22551668 is a wasteful number, since it uses less digits than its factorization.

22551668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637921 (or 5637919 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 22551668 is about 4748.8596525903. The cubic root of 22551668 is about 282.5267387957.

The spelling of 22551668 in words is "twenty-two million, five hundred fifty-one thousand, six hundred sixty-eight".