221433130 has 16 divisors (see below), whose sum is σ = 398792160. Its totient is φ = 88526032.

The previous prime is 221433119. The next prime is 221433137. The reversal of 221433130 is 31334122.

221433130 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 = 221433098 and 221433107.

It is not an unprimeable number, because it can be changed into a prime (221433137) 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, 18657 + ... + 28123.

It is an arithmetic number, because the mean of its divisors is an integer number (24924510).

Almost surely, 2^221433130 is an apocalyptic number.

221433130 is a deficient number, since it is larger than the sum of its proper divisors (177359030).

221433130 is a wasteful number, since it uses less digits than its factorization.

221433130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11813.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 221433130 is about 14880.6293549702. The cubic root of 221433130 is about 604.9890761409.

Adding to 221433130 its reverse (31334122), we get a palindrome (252767252).

It can be divided in two parts, 2214 and 33130, that added together give a square (35344 = 188²).

The spelling of 221433130 in words is "two hundred twenty-one million, four hundred thirty-three thousand, one hundred thirty".