40917281 has 2 divisors, whose sum is σ = 40917282. Its totient is φ = 40917280.

The previous prime is 40917271. The next prime is 40917287. The reversal of 40917281 is 18271904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35700625 + 5216656 = 5975^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 40917281 - 2¹⁴ = 40900897 is a prime.

It is a super-2 number, since 2×40917281² = 3348447768865922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40917287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20458640 + 20458641.

It is an arithmetic number, because the mean of its divisors is an integer number (20458641).

Almost surely, 2^40917281 is an apocalyptic number.

It is an amenable number.

40917281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40917281 is an equidigital number, since it uses as much as digits as its factorization.

40917281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 40917281 is about 6396.6617074846. The cubic root of 40917281 is about 344.5896710952.

The spelling of 40917281 in words is "forty million, nine hundred seventeen thousand, two hundred eighty-one".