421443315313 has 2 divisors, whose sum is σ = 421443315314. Its totient is φ = 421443315312.

The previous prime is 421443315289. The next prime is 421443315317. The reversal of 421443315313 is 313513344124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340475751009 + 80967564304 = 583503^2 + 284548^2 .

It is a cyclic number.

It is not a de Polignac number, because 421443315313 - 2²⁹ = 420906444401 is a prime.

It is a super-2 number, since 2×421443315313² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421443315317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210721657656 + 210721657657.

It is an arithmetic number, because the mean of its divisors is an integer number (210721657657).

Almost surely, 2^421443315313 is an apocalyptic number.

It is an amenable number.

421443315313 is a deficient number, since it is larger than the sum of its proper divisors (1).

421443315313 is an equidigital number, since it uses as much as digits as its factorization.

421443315313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 34.

Adding to 421443315313 its reverse (313513344124), we get a palindrome (734956659437).

The spelling of 421443315313 in words is "four hundred twenty-one billion, four hundred forty-three million, three hundred fifteen thousand, three hundred thirteen".