57222200 has 72 divisors (see below), whose sum is σ = 154789200. Its totient is φ = 19615680.

The previous prime is 57222199. The next prime is 57222203. The reversal of 57222200 is 222275.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57222203) 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 17 ways as a sum of consecutive naturals, for example, 6881 + ... + 12719.

It is an arithmetic number, because the mean of its divisors is an integer number (2149850).

Almost surely, 2^57222200 is an apocalyptic number.

57222200 is a gapful number since it is divisible by the number (50) 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 57222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77394600).

57222200 is an abundant number, since it is smaller than the sum of its proper divisors (97567000).

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

57222200 is a wasteful number, since it uses less digits than its factorization.

57222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5869 (or 5853 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 57222200 is about 7564.5356764312. The cubic root of 57222200 is about 385.3495448082.

Adding to 57222200 its reverse (222275), we get a palindrome (57444475).

The spelling of 57222200 in words is "fifty-seven million, two hundred twenty-two thousand, two hundred".