221472830 has 16 divisors (see below), whose sum is σ = 401563440. Its totient is φ = 87941952.

The previous prime is 221472817. The next prime is 221472847. The reversal of 221472830 is 38274122.

It is a junction number, because it is equal to n+sod(n) for n = 221472793 and 221472802.

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, 79460 + ... + 82199.

It is an arithmetic number, because the mean of its divisors is an integer number (25097715).

Almost surely, 2^221472830 is an apocalyptic number.

221472830 is a deficient number, since it is larger than the sum of its proper divisors (180090610).

221472830 is a wasteful number, since it uses less digits than its factorization.

221472830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161803.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 221472830 is about 14881.9632441422. The cubic root of 221472830 is about 605.0252294649.

The spelling of 221472830 in words is "two hundred twenty-one million, four hundred seventy-two thousand, eight hundred thirty".