40036081 has 2 divisors, whose sum is σ = 40036082. Its totient is φ = 40036080.

The previous prime is 40036019. The next prime is 40036091. The reversal of 40036081 is 18063004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36000000 + 4036081 = 6000^2 + 2009^2 .

It is a cyclic number.

It is not a de Polignac number, because 40036081 - 2¹⁹ = 39511793 is a prime.

It is a super-2 number, since 2×40036081² = 3205775563677122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40036091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20018040 + 20018041.

It is an arithmetic number, because the mean of its divisors is an integer number (20018041).

Almost surely, 2^40036081 is an apocalyptic number.

It is an amenable number.

40036081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40036081 is an equidigital number, since it uses as much as digits as its factorization.

40036081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40036081 is about 6327.4071308870. The cubic root of 40036081 is about 342.0979878361.

Adding to 40036081 its reverse (18063004), we get a palindrome (58099085).

It can be divided in two parts, 400 and 36081, that added together give a square (36481 = 191²).

The spelling of 40036081 in words is "forty million, thirty-six thousand, eighty-one".