40244081 has 2 divisors, whose sum is σ = 40244082. Its totient is φ = 40244080.

The previous prime is 40244059. The next prime is 40244137. The reversal of 40244081 is 18044204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38241856 + 2002225 = 6184^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 40244081 - 2¹⁰ = 40243057 is a prime.

It is a super-2 number, since 2×40244081² = 3239172111069122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40244011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122040 + 20122041.

It is an arithmetic number, because the mean of its divisors is an integer number (20122041).

Almost surely, 2^40244081 is an apocalyptic number.

It is an amenable number.

40244081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40244081 is an equidigital number, since it uses as much as digits as its factorization.

40244081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 40244081 is about 6343.8222705243. The cubic root of 40244081 is about 342.6894002785.

Adding to 40244081 its reverse (18044204), we get a palindrome (58288285).

The spelling of 40244081 in words is "forty million, two hundred forty-four thousand, eighty-one".