400243242013 has 16 divisors (see below), whose sum is σ = 423434575872. Its totient is φ = 377703504000.

The previous prime is 400243242011. The next prime is 400243242019. The reversal of 400243242013 is 310242342004.

It is a happy number.

It is not a de Polignac number, because 400243242013 - 2¹ = 400243242011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243242011) 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 in 15 ways as a sum of consecutive naturals, for example, 2608495 + ... + 2757667.

It is an arithmetic number, because the mean of its divisors is an integer number (26464660992).

Almost surely, 2^400243242013 is an apocalyptic number.

It is an amenable number.

400243242013 is a deficient number, since it is larger than the sum of its proper divisors (23191333859).

400243242013 is a wasteful number, since it uses less digits than its factorization.

400243242013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151356.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 400243242013 its reverse (310242342004), we get a palindrome (710485584017).

Subtracting from 400243242013 its reverse (310242342004), we obtain a palindrome (90000900009).

The spelling of 400243242013 in words is "four hundred billion, two hundred forty-three million, two hundred forty-two thousand, thirteen".