221133030 has 32 divisors (see below), whose sum is σ = 532756224. Its totient is φ = 58742496.

The previous prime is 221132993. The next prime is 221133061. The reversal of 221133030 is 30331122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6124 + ... + 21903.

It is an arithmetic number, because the mean of its divisors is an integer number (16648632).

Almost surely, 2^221133030 is an apocalyptic number.

221133030 is an abundant number, since it is smaller than the sum of its proper divisors (311623194).

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

221133030 is a wasteful number, since it uses less digits than its factorization.

221133030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28300.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 221133030 is about 14870.5423572915. The cubic root of 221133030 is about 604.7156462605.

Adding to 221133030 its reverse (30331122), we get a palindrome (251464152).

The spelling of 221133030 in words is "two hundred twenty-one million, one hundred thirty-three thousand, thirty".