221626630 has 16 divisors (see below), whose sum is σ = 399097440. Its totient is φ = 88612992.

The previous prime is 221626619. The next prime is 221626631. The reversal of 221626630 is 36626122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221626631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44191 + ... + 48949.

It is an arithmetic number, because the mean of its divisors is an integer number (24943590).

Almost surely, 2^221626630 is an apocalyptic number.

221626630 is a deficient number, since it is larger than the sum of its proper divisors (177470810).

221626630 is a wasteful number, since it uses less digits than its factorization.

221626630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 221626630 is about 14887.1296763345. The cubic root of 221626630 is about 605.1652486698.

The spelling of 221626630 in words is "two hundred twenty-one million, six hundred twenty-six thousand, six hundred thirty".