221244700 has 18 divisors (see below), whose sum is σ = 480101216. Its totient is φ = 88497840.

The previous prime is 221244697. The next prime is 221244707. The reversal of 221244700 is 7442122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221244707) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1106124 + ... + 1106323.

Almost surely, 2^221244700 is an apocalyptic number.

221244700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221244700 is an abundant number, since it is smaller than the sum of its proper divisors (258856516).

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

221244700 is a wasteful number, since it uses less digits than its factorization.

221244700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212461 (or 2212454 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 221244700 is about 14874.2966220255. The cubic root of 221244700 is about 604.8174209438.

Adding to 221244700 its reverse (7442122), we get a palindrome (228686822).

The spelling of 221244700 in words is "two hundred twenty-one million, two hundred forty-four thousand, seven hundred".