221422522 has 16 divisors (see below), whose sum is σ = 343994112. Its totient is φ = 106781760.

The previous prime is 221422519. The next prime is 221422529. The reversal of 221422522 is 225224122.

It is a junction number, because it is equal to n+sod(n) for n = 221422493 and 221422502.

It is not an unprimeable number, because it can be changed into a prime (221422529) 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, 13218 + ... + 24850.

It is an arithmetic number, because the mean of its divisors is an integer number (21499632).

Almost surely, 2^221422522 is an apocalyptic number.

221422522 is a deficient number, since it is larger than the sum of its proper divisors (122571590).

221422522 is a wasteful number, since it uses less digits than its factorization.

221422522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11973.

The product of its digits is 1280, while the sum is 22.

The square root of 221422522 is about 14880.2729141639. The cubic root of 221422522 is about 604.9794150954.

Adding to 221422522 its reverse (225224122), we get a palindrome (446646644).

The spelling of 221422522 in words is "two hundred twenty-one million, four hundred twenty-two thousand, five hundred twenty-two".