221064630 has 32 divisors (see below), whose sum is σ = 530959968. Its totient is φ = 58905600.

The previous prime is 221064629. The next prime is 221064647. The reversal of 221064630 is 36460122.

It is a self number, because there is not a number n which added to its sum of digits gives 221064630.

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, 60660 + ... + 64200.

It is an arithmetic number, because the mean of its divisors is an integer number (16592499).

Almost surely, 2^221064630 is an apocalyptic number.

221064630 is an abundant number, since it is smaller than the sum of its proper divisors (309895338).

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

221064630 is a wasteful number, since it uses less digits than its factorization.

221064630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5632.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 221064630 is about 14868.2423305514. The cubic root of 221064630 is about 604.6532904082.

The spelling of 221064630 in words is "two hundred twenty-one million, sixty-four thousand, six hundred thirty".