40541781 has 16 divisors (see below), whose sum is σ = 62650368. Its totient is φ = 22839600.

The previous prime is 40541779. The next prime is 40541783. The reversal of 40541781 is 18714504.

It is an interprime number because it is at equal distance from previous prime (40541779) and next prime (40541783).

It is not a de Polignac number, because 40541781 - 2¹ = 40541779 is a prime.

It is a super-2 number, since 2×40541781² = 3287272013303922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40541783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12105 + ... + 15086.

It is an arithmetic number, because the mean of its divisors is an integer number (3915648).

Almost surely, 2^40541781 is an apocalyptic number.

It is an amenable number.

40541781 is a deficient number, since it is larger than the sum of its proper divisors (22108587).

40541781 is a wasteful number, since it uses less digits than its factorization.

40541781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 40541781 is about 6367.2428098825. The cubic root of 40541781 is about 343.5323242932.

The spelling of 40541781 in words is "forty million, five hundred forty-one thousand, seven hundred eighty-one".