402144432013 has 2 divisors, whose sum is σ = 402144432014. Its totient is φ = 402144432012.

The previous prime is 402144431989. The next prime is 402144432047. The reversal of 402144432013 is 310234441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255224008809 + 146920423204 = 505197^2 + 383302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402144432013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144432073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072216006 + 201072216007.

It is an arithmetic number, because the mean of its divisors is an integer number (201072216007).

Almost surely, 2^402144432013 is an apocalyptic number.

It is an amenable number.

402144432013 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144432013 is an equidigital number, since it uses as much as digits as its factorization.

402144432013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 402144432013 its reverse (310234441204), we get a palindrome (712378873217).

The spelling of 402144432013 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-two thousand, thirteen".