222400555 has 16 divisors (see below), whose sum is σ = 288306144. Its totient is φ = 163722240.

The previous prime is 222400553. The next prime is 222400583. The reversal of 222400555 is 555004222.

It is a happy number.

It is not a de Polignac number, because 222400555 - 2¹ = 222400553 is a prime.

It is a super-3 number, since 3×222400555³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222400553) 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, 16347 + ... + 26683.

It is an arithmetic number, because the mean of its divisors is an integer number (18019134).

Almost surely, 2^222400555 is an apocalyptic number.

222400555 is a deficient number, since it is larger than the sum of its proper divisors (65905589).

222400555 is a wasteful number, since it uses less digits than its factorization.

222400555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10686.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 222400555 is about 14913.1001136585. The cubic root of 222400555 is about 605.8688470363.

Adding to 222400555 its reverse (555004222), we get a palindrome (777404777).

The spelling of 222400555 in words is "two hundred twenty-two million, four hundred thousand, five hundred fifty-five".