402444421243 has 2 divisors, whose sum is σ = 402444421244. Its totient is φ = 402444421242.

The previous prime is 402444421217. The next prime is 402444421283. The reversal of 402444421243 is 342124444204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402444421243 - 2¹³ = 402444413051 is a prime.

It is a super-2 number, since 2×402444421243² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402444421199 and 402444421208.

It is not a weakly prime, because it can be changed into another prime (402444421283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201222210621 + 201222210622.

It is an arithmetic number, because the mean of its divisors is an integer number (201222210622).

Almost surely, 2^402444421243 is an apocalyptic number.

402444421243 is a deficient number, since it is larger than the sum of its proper divisors (1).

402444421243 is an equidigital number, since it uses as much as digits as its factorization.

402444421243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98304, while the sum is 34.

Adding to 402444421243 its reverse (342124444204), we get a palindrome (744568865447).

The spelling of 402444421243 in words is "four hundred two billion, four hundred forty-four million, four hundred twenty-one thousand, two hundred forty-three".