221263253 has 2 divisors, whose sum is σ = 221263254. Its totient is φ = 221263252.

The previous prime is 221263247. The next prime is 221263297. The reversal of 221263253 is 352362122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213656689 + 7606564 = 14617^2 + 2758^2 .

It is a cyclic number.

It is not a de Polignac number, because 221263253 - 2¹⁴ = 221246869 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 (221263223) 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, 110631626 + 110631627.

It is an arithmetic number, because the mean of its divisors is an integer number (110631627).

Almost surely, 2^221263253 is an apocalyptic number.

It is an amenable number.

221263253 is a deficient number, since it is larger than the sum of its proper divisors (1).

221263253 is an equidigital number, since it uses as much as digits as its factorization.

221263253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 221263253 is about 14874.9202686939. The cubic root of 221263253 is about 604.8343266052.

The spelling of 221263253 in words is "two hundred twenty-one million, two hundred sixty-three thousand, two hundred fifty-three".