402144434213 has 2 divisors, whose sum is σ = 402144434214. Its totient is φ = 402144434212.

The previous prime is 402144434189. The next prime is 402144434257. The reversal of 402144434213 is 312434441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397930087489 + 4214346724 = 630817^2 + 64918^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144434213 - 2¹⁸ = 402144172069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402144434213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144437213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072217106 + 201072217107.

It is an arithmetic number, because the mean of its divisors is an integer number (201072217107).

Almost surely, 2^402144434213 is an apocalyptic number.

It is an amenable number.

402144434213 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144434213 is an equidigital number, since it uses as much as digits as its factorization.

402144434213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 402144434213 its reverse (312434441204), we get a palindrome (714578875417).

The spelling of 402144434213 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-four thousand, two hundred thirteen".