221136230 has 16 divisors (see below), whose sum is σ = 454908960. Its totient is φ = 75818112.

The previous prime is 221136211. The next prime is 221136233. The reversal of 221136230 is 32631122.

It is a happy number.

221136230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221136230² = 97802464437225800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221136233) 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, 1579475 + ... + 1579614.

It is an arithmetic number, because the mean of its divisors is an integer number (28431810).

Almost surely, 2^221136230 is an apocalyptic number.

221136230 is an abundant number, since it is smaller than the sum of its proper divisors (233772730).

221136230 is a wasteful number, since it uses less digits than its factorization.

221136230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159103.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 221136230 is about 14870.6499521709. The cubic root of 221136230 is about 604.7185631784.

Adding to 221136230 its reverse (32631122), we get a palindrome (253767352).

The spelling of 221136230 in words is "two hundred twenty-one million, one hundred thirty-six thousand, two hundred thirty".