400243012208231 has 2 divisors, whose sum is σ = 400243012208232. Its totient is φ = 400243012208230.

The previous prime is 400243012208203. The next prime is 400243012208251. The reversal of 400243012208231 is 132802210342004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400243012208231 - 2²⁶ = 400242945099367 is a prime.

It is a super-2 number, since 2×400243012208231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400243012208251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200121506104115 + 200121506104116.

It is an arithmetic number, because the mean of its divisors is an integer number (200121506104116).

Almost surely, 2^{400243012208231} is an apocalyptic number.

400243012208231 is a deficient number, since it is larger than the sum of its proper divisors (1).

400243012208231 is an equidigital number, since it uses as much as digits as its factorization.

400243012208231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 400243012208231 in words is "four hundred trillion, two hundred forty-three billion, twelve million, two hundred eight thousand, two hundred thirty-one".