221026453 has 2 divisors, whose sum is σ = 221026454. Its totient is φ = 221026452.

The previous prime is 221026441. The next prime is 221026471. The reversal of 221026453 is 354620122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145371249 + 75655204 = 12057^2 + 8698^2 .

It is a cyclic number.

It is not a de Polignac number, because 221026453 - 2¹³ = 221018261 is a prime.

It is a super-2 number, since 2×221026453² = 97705385851522418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221006453) 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, 110513226 + 110513227.

It is an arithmetic number, because the mean of its divisors is an integer number (110513227).

Almost surely, 2^221026453 is an apocalyptic number.

It is an amenable number.

221026453 is a deficient number, since it is larger than the sum of its proper divisors (1).

221026453 is an equidigital number, since it uses as much as digits as its factorization.

221026453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 221026453 is about 14866.9584313672. The cubic root of 221026453 is about 604.6184813155.

Adding to 221026453 its reverse (354620122), we get a palindrome (575646575).

The spelling of 221026453 in words is "two hundred twenty-one million, twenty-six thousand, four hundred fifty-three".