40411381 has 2 divisors, whose sum is σ = 40411382. Its totient is φ = 40411380.

The previous prime is 40411379. The next prime is 40411403. The reversal of 40411381 is 18311404.

It is an a-pointer prime, because the next prime (40411403) can be obtained adding 40411381 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37822500 + 2588881 = 6150^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 40411381 - 2¹ = 40411379 is a prime.

It is a super-2 number, since 2×40411381² = 3266159428654322, which contains 22 as substring.

Together with 40411379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40411351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20205690 + 20205691.

It is an arithmetic number, because the mean of its divisors is an integer number (20205691).

Almost surely, 2^40411381 is an apocalyptic number.

It is an amenable number.

40411381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40411381 is an equidigital number, since it uses as much as digits as its factorization.

40411381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 40411381 is about 6356.9946515630. The cubic root of 40411381 is about 343.1636122431.

Adding to 40411381 its reverse (18311404), we get a palindrome (58722785).

The spelling of 40411381 in words is "forty million, four hundred eleven thousand, three hundred eighty-one".