42140333561 has 2 divisors, whose sum is σ = 42140333562. Its totient is φ = 42140333560.

The previous prime is 42140333509. The next prime is 42140333593. The reversal of 42140333561 is 16533304124.

It is an a-pointer prime, because the next prime (42140333593) can be obtained adding 42140333561 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38722761961 + 3417571600 = 196781^2 + 58460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42140333561 is a prime.

It is not a weakly prime, because it can be changed into another prime (42140335561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21070166780 + 21070166781.

It is an arithmetic number, because the mean of its divisors is an integer number (21070166781).

Almost surely, 2^42140333561 is an apocalyptic number.

It is an amenable number.

42140333561 is a deficient number, since it is larger than the sum of its proper divisors (1).

42140333561 is an equidigital number, since it uses as much as digits as its factorization.

42140333561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 42140333561 its reverse (16533304124), we get a palindrome (58673637685).

The spelling of 42140333561 in words is "forty-two billion, one hundred forty million, three hundred thirty-three thousand, five hundred sixty-one".