40042429243 has 2 divisors, whose sum is σ = 40042429244. Its totient is φ = 40042429242.

The previous prime is 40042429241. The next prime is 40042429261. The reversal of 40042429243 is 34292424004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40042429243 - 2¹ = 40042429241 is a prime.

It is a super-2 number, since 2×40042429243² (a number of 22 digits) contains 22 as substring.

Together with 40042429241, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40042429199 and 40042429208.

It is not a weakly prime, because it can be changed into another prime (40042429241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021214621 + 20021214622.

It is an arithmetic number, because the mean of its divisors is an integer number (20021214622).

Almost surely, 2^40042429243 is an apocalyptic number.

40042429243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042429243 is an equidigital number, since it uses as much as digits as its factorization.

40042429243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 40042429243 in words is "forty billion, forty-two million, four hundred twenty-nine thousand, two hundred forty-three".