221227604 has 24 divisors (see below), whose sum is σ = 426629280. Its totient is φ = 99729504.

The previous prime is 221227597. The next prime is 221227627. The reversal of 221227604 is 406722122.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47234 + ... + 51705.

It is an arithmetic number, because the mean of its divisors is an integer number (17776220).

Almost surely, 2^221227604 is an apocalyptic number.

It is an amenable number.

221227604 is a deficient number, since it is larger than the sum of its proper divisors (205401676).

221227604 is a wasteful number, since it uses less digits than its factorization.

221227604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98999 (or 98997 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 221227604 is about 14873.7219282868. The cubic root of 221227604 is about 604.8018420772.

Adding to 221227604 its reverse (406722122), we get a palindrome (627949726).

The spelling of 221227604 in words is "two hundred twenty-one million, two hundred twenty-seven thousand, six hundred four".