40838531 has 2 divisors, whose sum is σ = 40838532. Its totient is φ = 40838530.

The previous prime is 40838527. The next prime is 40838533. The reversal of 40838531 is 13583804.

It is a happy number.

40838531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40838531 - 2² = 40838527 is a prime.

It is a super-2 number, since 2×40838531² = 3335571228475922, which contains 22 as substring.

Together with 40838533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40838533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20419265 + 20419266.

It is an arithmetic number, because the mean of its divisors is an integer number (20419266).

Almost surely, 2^40838531 is an apocalyptic number.

40838531 is a deficient number, since it is larger than the sum of its proper divisors (1).

40838531 is an equidigital number, since it uses as much as digits as its factorization.

40838531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 40838531 is about 6390.5031883256. The cubic root of 40838531 is about 344.3684616728.

The spelling of 40838531 in words is "forty million, eight hundred thirty-eight thousand, five hundred thirty-one".