221422253 has 8 divisors (see below), whose sum is σ = 242364696. Its totient is φ = 201038400.

The previous prime is 221422249. The next prime is 221422259. The reversal of 221422253 is 352224122.

221422253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25786084 + 195636169 = 5078^2 + 13987^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221422253 - 2² = 221422249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422259) 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, 138818 + ... + 140403.

It is an arithmetic number, because the mean of its divisors is an integer number (30295587).

Almost surely, 2^221422253 is an apocalyptic number.

It is an amenable number.

221422253 is a deficient number, since it is larger than the sum of its proper divisors (20942443).

221422253 is a wasteful number, since it uses less digits than its factorization.

221422253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279295.

The product of its digits is 1920, while the sum is 23.

The square root of 221422253 is about 14880.2638753484. The cubic root of 221422253 is about 604.9791701045.

Adding to 221422253 its reverse (352224122), we get a palindrome (573646375).

The spelling of 221422253 in words is "two hundred twenty-one million, four hundred twenty-two thousand, two hundred fifty-three".