22555555 has 16 divisors (see below), whose sum is σ = 29630304. Its totient is φ = 16346880.

The previous prime is 22555553. The next prime is 22555573. The reversal of 22555555 is 55555522.

22555555 = 11² + 12² + ... + 407².

It is not a de Polignac number, because 22555555 - 2¹ = 22555553 is a prime.

It is a super-2 number, since 2×22555555² = 1017506122716050, which contains 22 as substring.

22555555 is a modest number, since divided by 5555 gives 2255 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 22555555.

It is not an unprimeable number, because it can be changed into a prime (22555553) 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, 21319 + ... + 22351.

It is an arithmetic number, because the mean of its divisors is an integer number (1851894).

Almost surely, 2^22555555 is an apocalyptic number.

22555555 is a deficient number, since it is larger than the sum of its proper divisors (7074749).

22555555 is a wasteful number, since it uses less digits than its factorization.

22555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its digits is 62500, while the sum is 34.

The square root of 22555555 is about 4749.2688911031. The cubic root of 22555555 is about 282.5429699432.

The spelling of 22555555 in words is "twenty-two million, five hundred fifty-five thousand, five hundred fifty-five".