40032420243281 has 2 divisors, whose sum is σ = 40032420243282. Its totient is φ = 40032420243280.

The previous prime is 40032420243269. The next prime is 40032420243313. The reversal of 40032420243281 is 18234202423004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31611280556881 + 8421139686400 = 5622391^2 + 2901920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40032420243281 is a prime.

It is a super-2 number, since 2×40032420243281² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40032420246281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20016210121640 + 20016210121641.

It is an arithmetic number, because the mean of its divisors is an integer number (20016210121641).

Almost surely, 2^{40032420243281} is an apocalyptic number.

It is an amenable number.

40032420243281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40032420243281 is an equidigital number, since it uses as much as digits as its factorization.

40032420243281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 35.

Adding to 40032420243281 its reverse (18234202423004), we get a palindrome (58266622666285).

The spelling of 40032420243281 in words is "forty trillion, thirty-two billion, four hundred twenty million, two hundred forty-three thousand, two hundred eighty-one".