221630235 has 8 divisors (see below), whose sum is σ = 354608400. Its totient is φ = 118202784.

The previous prime is 221630219. The next prime is 221630249. The reversal of 221630235 is 532036122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221630235 - 2⁴ = 221630219 is a prime.

It is a super-2 number, since 2×221630235² = 98239922132310450, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7387660 + ... + 7387689.

It is an arithmetic number, because the mean of its divisors is an integer number (44326050).

Almost surely, 2^221630235 is an apocalyptic number.

221630235 is a deficient number, since it is larger than the sum of its proper divisors (132978165).

221630235 is a wasteful number, since it uses less digits than its factorization.

221630235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775357.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 221630235 is about 14887.2507535811. The cubic root of 221630235 is about 605.1685298773.

Adding to 221630235 its reverse (532036122), we get a palindrome (753666357).

The spelling of 221630235 in words is "two hundred twenty-one million, six hundred thirty thousand, two hundred thirty-five".