400023430421243 has 16 divisors (see below), whose sum is σ = 435269986794144. Its totient is φ = 366091180485120.

The previous prime is 400023430421189. The next prime is 400023430421287. The reversal of 400023430421243 is 342124034320004.

It is a cyclic number.

It is not a de Polignac number, because 400023430421243 - 2⁸ = 400023430420987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400023430321243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195145505 + ... + 197184722.

It is an arithmetic number, because the mean of its divisors is an integer number (27204374174634).

Almost surely, 2^{400023430421243} is an apocalyptic number.

400023430421243 is a deficient number, since it is larger than the sum of its proper divisors (35246556372901).

400023430421243 is a wasteful number, since it uses less digits than its factorization.

400023430421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392331902.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 400023430421243 its reverse (342124034320004), we get a palindrome (742147464741247).

The spelling of 400023430421243 in words is "four hundred trillion, twenty-three billion, four hundred thirty million, four hundred twenty-one thousand, two hundred forty-three".