400240301831 has 2 divisors, whose sum is σ = 400240301832. Its totient is φ = 400240301830.

The previous prime is 400240301807. The next prime is 400240301833. The reversal of 400240301831 is 138103042004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400240301831 - 2²² = 400236107527 is a prime.

It is a super-2 number, since 2×400240301831² (a number of 24 digits) contains 22 as substring.

Together with 400240301833, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400240301831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400240301833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200120150915 + 200120150916.

It is an arithmetic number, because the mean of its divisors is an integer number (200120150916).

Almost surely, 2^400240301831 is an apocalyptic number.

400240301831 is a deficient number, since it is larger than the sum of its proper divisors (1).

400240301831 is an equidigital number, since it uses as much as digits as its factorization.

400240301831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 400240301831 its reverse (138103042004), we get a palindrome (538343343835).

The spelling of 400240301831 in words is "four hundred billion, two hundred forty million, three hundred one thousand, eight hundred thirty-one".