200221493 has 2 divisors, whose sum is σ = 200221494. Its totient is φ = 200221492.

The previous prime is 200221447. The next prime is 200221517. The reversal of 200221493 is 394122002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176969809 + 23251684 = 13303^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 200221493 - 2⁸ = 200221237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200221403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110746 + 100110747.

It is an arithmetic number, because the mean of its divisors is an integer number (100110747).

Almost surely, 2^200221493 is an apocalyptic number.

It is an amenable number.

200221493 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221493 is an equidigital number, since it uses as much as digits as its factorization.

200221493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 200221493 is about 14149.9644169164. The cubic root of 200221493 is about 585.0193511509.

Adding to 200221493 its reverse (394122002), we get a palindrome (594343495).

The spelling of 200221493 in words is "two hundred million, two hundred twenty-one thousand, four hundred ninety-three".