221554122 has 16 divisors (see below), whose sum is σ = 443481312. Its totient is φ = 73789200.

The previous prime is 221554121. The next prime is 221554159. The reversal of 221554122 is 221455122.

221554122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221554092 and 221554101.

It is not an unprimeable number, because it can be changed into a prime (221554121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7504 + ... + 22347.

It is an arithmetic number, because the mean of its divisors is an integer number (27717582).

Almost surely, 2^221554122 is an apocalyptic number.

221554122 is an abundant number, since it is smaller than the sum of its proper divisors (221927190).

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

221554122 is a wasteful number, since it uses less digits than its factorization.

221554122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31093.

The product of its digits is 1600, while the sum is 24.

The square root of 221554122 is about 14884.6942192307. The cubic root of 221554122 is about 605.0992456088.

The spelling of 221554122 in words is "two hundred twenty-one million, five hundred fifty-four thousand, one hundred twenty-two".