40938281 has 2 divisors, whose sum is σ = 40938282. Its totient is φ = 40938280.

The previous prime is 40938257. The next prime is 40938319. The reversal of 40938281 is 18283904.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32672656 + 8265625 = 5716^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 40938281 - 2¹⁰ = 40937257 is a prime.

It is a super-2 number, since 2×40938281² = 3351885702469922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40938211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20469140 + 20469141.

It is an arithmetic number, because the mean of its divisors is an integer number (20469141).

Almost surely, 2^40938281 is an apocalyptic number.

It is an amenable number.

40938281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40938281 is an equidigital number, since it uses as much as digits as its factorization.

40938281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 40938281 is about 6398.3029781341. The cubic root of 40938281 is about 344.6486123322.

The spelling of 40938281 in words is "forty million, nine hundred thirty-eight thousand, two hundred eighty-one".