221249630 has 16 divisors (see below), whose sum is σ = 455142240. Its totient is φ = 75856992.

The previous prime is 221249569. The next prime is 221249647. The reversal of 221249630 is 36942122.

It is a junction number, because it is equal to n+sod(n) for n = 221249593 and 221249602.

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, 1580285 + ... + 1580424.

It is an arithmetic number, because the mean of its divisors is an integer number (28446390).

Almost surely, 2^221249630 is an apocalyptic number.

221249630 is an abundant number, since it is smaller than the sum of its proper divisors (233892610).

221249630 is a wasteful number, since it uses less digits than its factorization.

221249630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160723.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 221249630 is about 14874.4623432244. The cubic root of 221249630 is about 604.8219132966.

The spelling of 221249630 in words is "two hundred twenty-one million, two hundred forty-nine thousand, six hundred thirty".