221435530 has 16 divisors (see below), whose sum is σ = 400813920. Its totient is φ = 88078672.

The previous prime is 221435521. The next prime is 221435563. The reversal of 221435530 is 35534122.

221435530 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 = 221435495 and 221435504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60064 + ... + 63643.

It is an arithmetic number, because the mean of its divisors is an integer number (25050870).

Almost surely, 2^221435530 is an apocalyptic number.

221435530 is a deficient number, since it is larger than the sum of its proper divisors (179378390).

221435530 is a wasteful number, since it uses less digits than its factorization.

221435530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123893.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 221435530 is about 14880.7099965022. The cubic root of 221435530 is about 604.9912618550.

Adding to 221435530 its reverse (35534122), we get a palindrome (256969652).

The spelling of 221435530 in words is "two hundred twenty-one million, four hundred thirty-five thousand, five hundred thirty".