402442313291 has 2 divisors, whose sum is σ = 402442313292. Its totient is φ = 402442313290.

The previous prime is 402442313279. The next prime is 402442313311. The reversal of 402442313291 is 192313244204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402442313291 - 2¹⁰ = 402442312267 is a prime.

It is a super-2 number, since 2×402442313291² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402442313591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201221156645 + 201221156646.

It is an arithmetic number, because the mean of its divisors is an integer number (201221156646).

Almost surely, 2^402442313291 is an apocalyptic number.

402442313291 is a deficient number, since it is larger than the sum of its proper divisors (1).

402442313291 is an equidigital number, since it uses as much as digits as its factorization.

402442313291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 402442313291 its reverse (192313244204), we get a palindrome (594755557495).

The spelling of 402442313291 in words is "four hundred two billion, four hundred forty-two million, three hundred thirteen thousand, two hundred ninety-one".