40804031 has 2 divisors, whose sum is σ = 40804032. Its totient is φ = 40804030.

The previous prime is 40804021. The next prime is 40804051. The reversal of 40804031 is 13040804.

It is an a-pointer prime, because the next prime (40804051) can be obtained adding 40804031 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40804031 - 2¹⁴ = 40787647 is a prime.

It is a super-3 number, since 3×40804031³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 40803994 and 40804012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40804021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20402015 + 20402016.

It is an arithmetic number, because the mean of its divisors is an integer number (20402016).

Almost surely, 2^40804031 is an apocalyptic number.

40804031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40804031 is an equidigital number, since it uses as much as digits as its factorization.

40804031 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 20.

The square root of 40804031 is about 6387.8033000399. The cubic root of 40804031 is about 344.2714612928.

Adding to 40804031 its reverse (13040804), we get a palindrome (53844835).

The spelling of 40804031 in words is "forty million, eight hundred four thousand, thirty-one".