40544431 has 2 divisors, whose sum is σ = 40544432. Its totient is φ = 40544430.

The previous prime is 40544411. The next prime is 40544437. The reversal of 40544431 is 13444504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40544431 is a prime.

It is a super-2 number, since 2×40544431² = 3287701770227522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40544396 and 40544405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40544437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272215 + 20272216.

It is an arithmetic number, because the mean of its divisors is an integer number (20272216).

Almost surely, 2^40544431 is an apocalyptic number.

40544431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40544431 is an equidigital number, since it uses as much as digits as its factorization.

40544431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 40544431 is about 6367.4509028339. The cubic root of 40544431 is about 343.5398090887.

Adding to 40544431 its reverse (13444504), we get a palindrome (53988935).

The spelling of 40544431 in words is "forty million, five hundred forty-four thousand, four hundred thirty-one".