221636130 has 16 divisors (see below), whose sum is σ = 531926784. Its totient is φ = 59102960.

The previous prime is 221636111. The next prime is 221636141. The reversal of 221636130 is 31636122.

It is a happy number.

221636130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221636130.

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, 3693906 + ... + 3693965.

It is an arithmetic number, because the mean of its divisors is an integer number (33245424).

Almost surely, 2^221636130 is an apocalyptic number.

221636130 is an abundant number, since it is smaller than the sum of its proper divisors (310290654).

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

221636130 is a wasteful number, since it uses less digits than its factorization.

221636130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387881.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 221636130 is about 14887.4487404659. The cubic root of 221636130 is about 605.1738953258.

The spelling of 221636130 in words is "two hundred twenty-one million, six hundred thirty-six thousand, one hundred thirty".