40361381 has 2 divisors, whose sum is σ = 40361382. Its totient is φ = 40361380.

The previous prime is 40361353. The next prime is 40361407. The reversal of 40361381 is 18316304.

It is an a-pointer prime, because the next prime (40361407) can be obtained adding 40361381 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 11792356 = 5345^2 + 3434^2 .

It is a cyclic number.

It is not a de Polignac number, because 40361381 - 2¹⁸ = 40099237 is a prime.

It is a super-2 number, since 2×40361381² = 3258082152454322, 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 40361381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40361311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20180690 + 20180691.

It is an arithmetic number, because the mean of its divisors is an integer number (20180691).

Almost surely, 2^40361381 is an apocalyptic number.

It is an amenable number.

40361381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40361381 is an equidigital number, since it uses as much as digits as its factorization.

40361381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40361381 is about 6353.0607584061. The cubic root of 40361381 is about 343.0220245556.

Adding to 40361381 its reverse (18316304), we get a palindrome (58677685).

The spelling of 40361381 in words is "forty million, three hundred sixty-one thousand, three hundred eighty-one".