221580930 has 16 divisors (see below), whose sum is σ = 531794304. Its totient is φ = 59088240.

The previous prime is 221580929. The next prime is 221580937. The reversal of 221580930 is 39085122.

It is a happy number.

221580930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 7386031 = 221580930 / (2 + 2 + 1 + 5 + 8 + 0 + 9 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (221580937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692986 + ... + 3693045.

It is an arithmetic number, because the mean of its divisors is an integer number (33237144).

Almost surely, 2^221580930 is an apocalyptic number.

221580930 is an abundant number, since it is smaller than the sum of its proper divisors (310213374).

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

221580930 is a wasteful number, since it uses less digits than its factorization.

221580930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7386041.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 221580930 is about 14885.5947143539. The cubic root of 221580930 is about 605.1236502496.

The spelling of 221580930 in words is "two hundred twenty-one million, five hundred eighty thousand, nine hundred thirty".