221226248 has 8 divisors (see below), whose sum is σ = 414799230. Its totient is φ = 110613120.

The previous prime is 221226241. The next prime is 221226263. The reversal of 221226248 is 842622122.

It can be written as a sum of positive squares in only one way, i.e., 165842884 + 55383364 = 12878^2 + 7442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 221226248.

It is not an unprimeable number, because it can be changed into a prime (221226241) 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 as a sum of consecutive naturals, namely, 13826633 + ... + 13826648.

Almost surely, 2^221226248 is an apocalyptic number.

It is an amenable number.

221226248 is a deficient number, since it is larger than the sum of its proper divisors (193572982).

221226248 is a wasteful number, since it uses less digits than its factorization.

221226248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27653287 (or 27653283 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 221226248 is about 14873.6763444684. The cubic root of 221226248 is about 604.8006063771.

The spelling of 221226248 in words is "two hundred twenty-one million, two hundred twenty-six thousand, two hundred forty-eight".