221122854 has 48 divisors (see below), whose sum is σ = 499122000. Its totient is φ = 70663488.

The previous prime is 221122843. The next prime is 221122861. The reversal of 221122854 is 458221122.

It is a super-2 number, since 2×221122854² = 97790633122210632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76357 + ... + 79199.

It is an arithmetic number, because the mean of its divisors is an integer number (10398375).

Almost surely, 2^221122854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249561000).

221122854 is an abundant number, since it is smaller than the sum of its proper divisors (277999146).

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

221122854 is a wasteful number, since it uses less digits than its factorization.

221122854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029 (or 3026 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 221122854 is about 14870.2002004008. The cubic root of 221122854 is about 604.7063702742.

Adding to 221122854 its reverse (458221122), we get a palindrome (679343976).

The spelling of 221122854 in words is "two hundred twenty-one million, one hundred twenty-two thousand, eight hundred fifty-four".