40305537731 has 2 divisors, whose sum is σ = 40305537732. Its totient is φ = 40305537730.

The previous prime is 40305537707. The next prime is 40305537733. The reversal of 40305537731 is 13773550304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40305537731 - 2⁶ = 40305537667 is a prime.

It is a super-3 number, since 3×40305537731³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 40305537733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40305537733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20152768865 + 20152768866.

It is an arithmetic number, because the mean of its divisors is an integer number (20152768866).

Almost surely, 2^40305537731 is an apocalyptic number.

40305537731 is a deficient number, since it is larger than the sum of its proper divisors (1).

40305537731 is an equidigital number, since it uses as much as digits as its factorization.

40305537731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 38.

The spelling of 40305537731 in words is "forty billion, three hundred five million, five hundred thirty-seven thousand, seven hundred thirty-one".