400303221293 has 2 divisors, whose sum is σ = 400303221294. Its totient is φ = 400303221292.

The previous prime is 400303221281. The next prime is 400303221341. The reversal of 400303221293 is 392122303004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315110454409 + 85192766884 = 561347^2 + 291878^2 .

It is a cyclic number.

It is not a de Polignac number, because 400303221293 - 2⁸ = 400303221037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400303221193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200151610646 + 200151610647.

It is an arithmetic number, because the mean of its divisors is an integer number (200151610647).

Almost surely, 2^400303221293 is an apocalyptic number.

It is an amenable number.

400303221293 is a deficient number, since it is larger than the sum of its proper divisors (1).

400303221293 is an equidigital number, since it uses as much as digits as its factorization.

400303221293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 400303221293 its reverse (392122303004), we get a palindrome (792425524297).

The spelling of 400303221293 in words is "four hundred billion, three hundred three million, two hundred twenty-one thousand, two hundred ninety-three".