400243012203231 has 6 divisors (see below), whose sum is σ = 578128795404680. Its totient is φ = 266828674802148.

The previous prime is 400243012203227. The next prime is 400243012203311. The reversal of 400243012203231 is 132302210342004.

400243012203231 is a `hidden beast` number, since 4 + 0 + 0 + 2 + 430 + 1 + 2 + 203 + 23 + 1 = 666.

It is not a de Polignac number, because 400243012203231 - 2² = 400243012203227 is a prime.

It is a super-2 number, since 2×400243012203231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400243012203195 and 400243012203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243012208231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22235722900171 + ... + 22235722900188.

Almost surely, 2^{400243012203231} is an apocalyptic number.

400243012203231 is a deficient number, since it is larger than the sum of its proper divisors (177885783201449).

400243012203231 is a wasteful number, since it uses less digits than its factorization.

400243012203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44471445800365 (or 44471445800362 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 400243012203231 its reverse (132302210342004), we get a palindrome (532545222545235).

The spelling of 400243012203231 in words is "four hundred trillion, two hundred forty-three billion, twelve million, two hundred three thousand, two hundred thirty-one".