221830822 has 8 divisors (see below), whose sum is σ = 333314856. Its totient is φ = 110725872.

The previous prime is 221830793. The next prime is 221830877. The reversal of 221830822 is 228038122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93303 + ... + 95650.

It is an arithmetic number, because the mean of its divisors is an integer number (41664357).

Almost surely, 2^221830822 is an apocalyptic number.

221830822 is a deficient number, since it is larger than the sum of its proper divisors (111484034).

221830822 is a wasteful number, since it uses less digits than its factorization.

221830822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189542.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 221830822 is about 14893.9861017795. The cubic root of 221830822 is about 605.3510445918.

Adding to 221830822 its reverse (228038122), we get a palindrome (449868944).

The spelling of 221830822 in words is "two hundred twenty-one million, eight hundred thirty thousand, eight hundred twenty-two".