42917457731 has 2 divisors, whose sum is σ = 42917457732. Its totient is φ = 42917457730.

The previous prime is 42917457727. The next prime is 42917457733. The reversal of 42917457731 is 13775471924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42917457731 - 2² = 42917457727 is a prime.

It is a super-2 number, since 2×42917457731² (a number of 22 digits) contains 22 as substring.

Together with 42917457733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42917457731.

It is not a weakly prime, because it can be changed into another prime (42917457733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21458728865 + 21458728866.

It is an arithmetic number, because the mean of its divisors is an integer number (21458728866).

Almost surely, 2^42917457731 is an apocalyptic number.

42917457731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42917457731 is an equidigital number, since it uses as much as digits as its factorization.

42917457731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1481760, while the sum is 50.

The spelling of 42917457731 in words is "forty-two billion, nine hundred seventeen million, four hundred fifty-seven thousand, seven hundred thirty-one".