221357630 has 16 divisors (see below), whose sum is σ = 429093504. Its totient is φ = 81732000.

The previous prime is 221357567. The next prime is 221357659. The reversal of 221357630 is 36753122.

221357630 is digitally balanced in base 3, 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 = 221357593 and 221357602.

It is a congruent number.

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, 851246 + ... + 851505.

It is an arithmetic number, because the mean of its divisors is an integer number (26818344).

Almost surely, 2^221357630 is an apocalyptic number.

221357630 is a deficient number, since it is larger than the sum of its proper divisors (207735874).

221357630 is a wasteful number, since it uses less digits than its factorization.

221357630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702771.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 221357630 is about 14878.0922836229. The cubic root of 221357630 is about 604.9203091538.

The spelling of 221357630 in words is "two hundred twenty-one million, three hundred fifty-seven thousand, six hundred thirty".