431355540012391 has 2 divisors, whose sum is σ = 431355540012392. Its totient is φ = 431355540012390.

The previous prime is 431355540012373. The next prime is 431355540012479. The reversal of 431355540012391 is 193210045553134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431355540012391 - 2²⁵ = 431355506457959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431355543012391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215677770006195 + 215677770006196.

It is an arithmetic number, because the mean of its divisors is an integer number (215677770006196).

Almost surely, 2^{431355540012391} is an apocalyptic number.

431355540012391 is a deficient number, since it is larger than the sum of its proper divisors (1).

431355540012391 is an equidigital number, since it uses as much as digits as its factorization.

431355540012391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 431355540012391 in words is "four hundred thirty-one trillion, three hundred fifty-five billion, five hundred forty million, twelve thousand, three hundred ninety-one".