40056281 has 2 divisors, whose sum is σ = 40056282. Its totient is φ = 40056280.

The previous prime is 40056253. The next prime is 40056383. The reversal of 40056281 is 18265004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23377225 + 16679056 = 4835^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 40056281 - 2⁶ = 40056217 is a prime.

It is a super-2 number, since 2×40056281² = 3209011295101922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40056281.

It is not a weakly prime, because it can be changed into another prime (40056481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20028140 + 20028141.

It is an arithmetic number, because the mean of its divisors is an integer number (20028141).

Almost surely, 2^40056281 is an apocalyptic number.

It is an amenable number.

40056281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40056281 is an equidigital number, since it uses as much as digits as its factorization.

40056281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 40056281 is about 6329.0031600561. The cubic root of 40056281 is about 342.1555127596.

The spelling of 40056281 in words is "forty million, fifty-six thousand, two hundred eighty-one".