222199380 has 144 divisors (see below), whose sum is σ = 730613520. Its totient is φ = 54337536.

The previous prime is 222199339. The next prime is 222199463. The reversal of 222199380 is 83991222.

It can be written as a sum of positive squares in 8 ways, for example, as 65999376 + 156200004 = 8124^2 + 12498^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 629284 + ... + 629636.

It is an arithmetic number, because the mean of its divisors is an integer number (5073705).

Almost surely, 2^222199380 is an apocalyptic number.

222199380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222199380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365306760).

222199380 is an abundant number, since it is smaller than the sum of its proper divisors (508414140).

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

222199380 is a wasteful number, since it uses less digits than its factorization.

222199380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 222199380 is about 14906.3536788847. The cubic root of 222199380 is about 605.6861100301.

The spelling of 222199380 in words is "two hundred twenty-two million, one hundred ninety-nine thousand, three hundred eighty".