221399130 has 32 divisors (see below), whose sum is σ = 531987264. Its totient is φ = 58969856.

The previous prime is 221399119. The next prime is 221399161. The reversal of 221399130 is 31993122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 24514 + ... + 32306.

It is an arithmetic number, because the mean of its divisors is an integer number (16624602).

Almost surely, 2^221399130 is an apocalyptic number.

221399130 is an abundant number, since it is smaller than the sum of its proper divisors (310588134).

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

221399130 is a wasteful number, since it uses less digits than its factorization.

221399130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8750.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 221399130 is about 14879.4868863143. The cubic root of 221399130 is about 604.9581101611.

The spelling of 221399130 in words is "two hundred twenty-one million, three hundred ninety-nine thousand, one hundred thirty".