42431252014391 has 2 divisors, whose sum is σ = 42431252014392. Its totient is φ = 42431252014390.

The previous prime is 42431252014387. The next prime is 42431252014457. The reversal of 42431252014391 is 19341025213424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42431252014391 - 2² = 42431252014387 is a prime.

It is a super-2 number, since 2×42431252014391² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42431252064391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215626007195 + 21215626007196.

It is an arithmetic number, because the mean of its divisors is an integer number (21215626007196).

Almost surely, 2^{42431252014391} is an apocalyptic number.

42431252014391 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431252014391 is an equidigital number, since it uses as much as digits as its factorization.

42431252014391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 42431252014391 in words is "forty-two trillion, four hundred thirty-one billion, two hundred fifty-two million, fourteen thousand, three hundred ninety-one".