40032481 has 2 divisors, whose sum is σ = 40032482. Its totient is φ = 40032480.

The previous prime is 40032479. The next prime is 40032521. The reversal of 40032481 is 18423004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39891856 + 140625 = 6316^2 + 375^2 .

It is a cyclic number.

It is not a de Polignac number, because 40032481 - 2¹ = 40032479 is a prime.

It is a super-3 number, since 3×40032481³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 40032479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40032401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20016240 + 20016241.

It is an arithmetic number, because the mean of its divisors is an integer number (20016241).

Almost surely, 2^40032481 is an apocalyptic number.

It is an amenable number.

40032481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40032481 is an equidigital number, since it uses as much as digits as its factorization.

40032481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 40032481 is about 6327.1226477760. The cubic root of 40032481 is about 342.0877338382.

Adding to 40032481 its reverse (18423004), we get a palindrome (58455485).

The spelling of 40032481 in words is "forty million, thirty-two thousand, four hundred eighty-one".