22022555 has 16 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 16681440.

The previous prime is 22022551. The next prime is 22022563. The reversal of 22022555 is 55522022.

It is a happy number.

It is not a de Polignac number, because 22022555 - 2² = 22022551 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 22022555.

It is not an unprimeable number, because it can be changed into a prime (22022551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5774 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (1741824).

Almost surely, 2^22022555 is an apocalyptic number.

22022555 is a deficient number, since it is larger than the sum of its proper divisors (5846629).

22022555 is a wasteful number, since it uses less digits than its factorization.

22022555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 22022555 is about 4692.8195149611. The cubic root of 22022555 is about 280.2996579311.

Adding to 22022555 its reverse (55522022), we get a palindrome (77544577).

The spelling of 22022555 in words is "twenty-two million, twenty-two thousand, five hundred fifty-five".