400002231913 has 2 divisors, whose sum is σ = 400002231914. Its totient is φ = 400002231912.

The previous prime is 400002231887. The next prime is 400002231943. The reversal of 400002231913 is 319132200004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396644261209 + 3357970704 = 629797^2 + 57948^2 .

It is a cyclic number.

It is not a de Polignac number, because 400002231913 - 2⁹ = 400002231401 is a prime.

It is not a weakly prime, because it can be changed into another prime (400002231943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200001115956 + 200001115957.

It is an arithmetic number, because the mean of its divisors is an integer number (200001115957).

Almost surely, 2^400002231913 is an apocalyptic number.

It is an amenable number.

400002231913 is a deficient number, since it is larger than the sum of its proper divisors (1).

400002231913 is an equidigital number, since it uses as much as digits as its factorization.

400002231913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 400002231913 its reverse (319132200004), we get a palindrome (719134431917).

The spelling of 400002231913 in words is "four hundred billion, two million, two hundred thirty-one thousand, nine hundred thirteen".