42040434131 has 2 divisors, whose sum is σ = 42040434132. Its totient is φ = 42040434130.

The previous prime is 42040434127. The next prime is 42040434199. The reversal of 42040434131 is 13143404024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42040434131 - 2² = 42040434127 is a prime.

It is a super-2 number, since 2×42040434131² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42040434131.

It is not a weakly prime, because it can be changed into another prime (42040424131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020217065 + 21020217066.

It is an arithmetic number, because the mean of its divisors is an integer number (21020217066).

Almost surely, 2^42040434131 is an apocalyptic number.

42040434131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040434131 is an equidigital number, since it uses as much as digits as its factorization.

42040434131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 42040434131 its reverse (13143404024), we get a palindrome (55183838155).

The spelling of 42040434131 in words is "forty-two billion, forty million, four hundred thirty-four thousand, one hundred thirty-one".