222211400 has 24 divisors (see below), whose sum is σ = 516641970. Its totient is φ = 88884480.

The previous prime is 222211391. The next prime is 222211417. The reversal of 222211400 is 4112222.

It can be written as a sum of positive squares in 3 ways, for example, as 179935396 + 42276004 = 13414^2 + 6502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555329 + ... + 555728.

Almost surely, 2^222211400 is an apocalyptic number.

222211400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222211400 is an abundant number, since it is smaller than the sum of its proper divisors (294430570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222211400 is a wasteful number, since it uses less digits than its factorization.

222211400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111073 (or 1111064 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 222211400 is about 14906.7568572108. The cubic root of 222211400 is about 605.6970314763.

Adding to 222211400 its reverse (4112222), we get a palindrome (226323622).

The spelling of 222211400 in words is "two hundred twenty-two million, two hundred eleven thousand, four hundred".