7221436493 has 2 divisors, whose sum is σ = 7221436494. Its totient is φ = 7221436492.

The previous prime is 7221436367. The next prime is 7221436517. The reversal of 7221436493 is 3946341227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6726952324 + 494484169 = 82018^2 + 22237^2 .

It is a cyclic number.

It is not a de Polignac number, because 7221436493 - 2¹⁶ = 7221370957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7221436493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7221436693) 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, 3610718246 + 3610718247.

It is an arithmetic number, because the mean of its divisors is an integer number (3610718247).

Almost surely, 2^7221436493 is an apocalyptic number.

It is an amenable number.

7221436493 is a deficient number, since it is larger than the sum of its proper divisors (1).

7221436493 is an equidigital number, since it uses as much as digits as its factorization.

7221436493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 7221436493 is about 84979.0356087900. The cubic root of 7221436493 is about 1932.8932322024.

The spelling of 7221436493 in words is "seven billion, two hundred twenty-one million, four hundred thirty-six thousand, four hundred ninety-three".