221063380 has 12 divisors (see below), whose sum is σ = 464233140. Its totient is φ = 88425344.

The previous prime is 221063363. The next prime is 221063407. The reversal of 221063380 is 83360122.

It can be written as a sum of positive squares in 2 ways, for example, as 93779856 + 127283524 = 9684^2 + 11282^2 .

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 3 ways as a sum of consecutive naturals, for example, 5526565 + ... + 5526604.

It is an arithmetic number, because the mean of its divisors is an integer number (38686095).

Almost surely, 2^221063380 is an apocalyptic number.

221063380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221063380 is an abundant number, since it is smaller than the sum of its proper divisors (243169760).

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

221063380 is a wasteful number, since it uses less digits than its factorization.

221063380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11053178 (or 11053176 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 221063380 is about 14868.2002945884. The cubic root of 221063380 is about 604.6521507445.

The spelling of 221063380 in words is "two hundred twenty-one million, sixty-three thousand, three hundred eighty".