221143253 has 2 divisors, whose sum is σ = 221143254. Its totient is φ = 221143252.

The previous prime is 221143249. The next prime is 221143271. The reversal of 221143253 is 352341122.

221143253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142253329 + 78889924 = 11927^2 + 8882^2 .

It is a cyclic number.

It is not a de Polignac number, because 221143253 - 2² = 221143249 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221143753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110571626 + 110571627.

It is an arithmetic number, because the mean of its divisors is an integer number (110571627).

Almost surely, 2^221143253 is an apocalyptic number.

It is an amenable number.

221143253 is a deficient number, since it is larger than the sum of its proper divisors (1).

221143253 is an equidigital number, since it uses as much as digits as its factorization.

221143253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 221143253 is about 14870.8860865787. The cubic root of 221143253 is about 604.7249648032.

Adding to 221143253 its reverse (352341122), we get a palindrome (573484375).

The spelling of 221143253 in words is "two hundred twenty-one million, one hundred forty-three thousand, two hundred fifty-three".