221038622 has 16 divisors (see below), whose sum is σ = 382279392. Its totient is φ = 93891840.

The previous prime is 221038591. The next prime is 221038627. The reversal of 221038622 is 226830122.

It is a junction number, because it is equal to n+sod(n) for n = 221038591 and 221038600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221038627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68279 + ... + 71442.

It is an arithmetic number, because the mean of its divisors is an integer number (23892462).

Almost surely, 2^221038622 is an apocalyptic number.

221038622 is a deficient number, since it is larger than the sum of its proper divisors (161240770).

221038622 is a wasteful number, since it uses less digits than its factorization.

221038622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139843.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 221038622 is about 14867.3676890027. The cubic root of 221038622 is about 604.6295772230.

Adding to 221038622 its reverse (226830122), we get a palindrome (447868744).

The spelling of 221038622 in words is "two hundred twenty-one million, thirty-eight thousand, six hundred twenty-two".