221064530 has 16 divisors (see below), whose sum is σ = 398127744. Its totient is φ = 88378800.

The previous prime is 221064517. The next prime is 221064539. The reversal of 221064530 is 35460122.

221064530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221064496 and 221064505.

It is not an unprimeable number, because it can be changed into a prime (221064539) 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, 18809 + ... + 28211.

It is an arithmetic number, because the mean of its divisors is an integer number (24882984).

Almost surely, 2^221064530 is an apocalyptic number.

221064530 is a deficient number, since it is larger than the sum of its proper divisors (177063214).

221064530 is a wasteful number, since it uses less digits than its factorization.

221064530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11761.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 221064530 is about 14868.2389676787. The cubic root of 221064530 is about 604.6531992353.

The spelling of 221064530 in words is "two hundred twenty-one million, sixty-four thousand, five hundred thirty".