221324010 has 64 divisors (see below), whose sum is σ = 558340992. Its totient is φ = 56077056.

The previous prime is 221323997. The next prime is 221324021. The reversal of 221324010 is 10423122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 31 ways as a sum of consecutive naturals, for example, 45412 + ... + 50048.

It is an arithmetic number, because the mean of its divisors is an integer number (8724078).

Almost surely, 2^221324010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221324010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279170496).

221324010 is an abundant number, since it is smaller than the sum of its proper divisors (337016982).

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

221324010 is a wasteful number, since it uses less digits than its factorization.

221324010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4727.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 221324010 is about 14876.9623915637. The cubic root of 221324010 is about 604.8896823193.

Adding to 221324010 its reverse (10423122), we get a palindrome (231747132).

The spelling of 221324010 in words is "two hundred twenty-one million, three hundred twenty-four thousand, ten".