40035521 has 2 divisors, whose sum is σ = 40035522. Its totient is φ = 40035520.

The previous prime is 40035509. The next prime is 40035529. The reversal of 40035521 is 12553004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25897921 + 14137600 = 5089^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 40035521 - 2²² = 35841217 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40035493 and 40035502.

It is not a weakly prime, because it can be changed into another prime (40035529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20017760 + 20017761.

It is an arithmetic number, because the mean of its divisors is an integer number (20017761).

Almost surely, 2^40035521 is an apocalyptic number.

It is an amenable number.

40035521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40035521 is an equidigital number, since it uses as much as digits as its factorization.

40035521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40035521 is about 6327.3628787987. The cubic root of 40035521 is about 342.0963928102.

Adding to 40035521 its reverse (12553004), we get a palindrome (52588525).

The spelling of 40035521 in words is "forty million, thirty-five thousand, five hundred twenty-one".