221041300 has 18 divisors (see below), whose sum is σ = 479659838. Its totient is φ = 88416480.

The previous prime is 221041297. The next prime is 221041319. The reversal of 221041300 is 3140122.

It can be written as a sum of positive squares in 3 ways, for example, as 33570436 + 187470864 = 5794^2 + 13692^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1105107 + ... + 1105306.

Almost surely, 2^221041300 is an apocalyptic number.

221041300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221041300 is an abundant number, since it is smaller than the sum of its proper divisors (258618538).

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

221041300 is a wasteful number, since it uses less digits than its factorization.

221041300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210427 (or 2210420 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221041300 is about 14867.4577517476. The cubic root of 221041300 is about 604.6320190157.

Adding to 221041300 its reverse (3140122), we get a palindrome (224181422).

The spelling of 221041300 in words is "two hundred twenty-one million, forty-one thousand, three hundred".