221225262 has 16 divisors (see below), whose sum is σ = 443224272. Its totient is φ = 73612800.

The previous prime is 221225209. The next prime is 221225309. The reversal of 221225262 is 262522122.

It is a happy number.

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, 28489 + ... + 35412.

It is an arithmetic number, because the mean of its divisors is an integer number (27701517).

Almost surely, 2^221225262 is an apocalyptic number.

221225262 is an abundant number, since it is smaller than the sum of its proper divisors (221999010).

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

221225262 is a wasteful number, since it uses less digits than its factorization.

221225262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64483.

The product of its digits is 1920, while the sum is 24.

The square root of 221225262 is about 14873.6431986249. The cubic root of 221225262 is about 604.7997078485.

Adding to 221225262 its reverse (262522122), we get a palindrome (483747384).

The spelling of 221225262 in words is "two hundred twenty-one million, two hundred twenty-five thousand, two hundred sixty-two".