40244521 has 2 divisors, whose sum is σ = 40244522. Its totient is φ = 40244520.

The previous prime is 40244509. The next prime is 40244551. The reversal of 40244521 is 12544204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 19669225 = 4536^2 + 4435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40244521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40244492 and 40244501.

It is not a weakly prime, because it can be changed into another prime (40244551) 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, 20122260 + 20122261.

It is an arithmetic number, because the mean of its divisors is an integer number (20122261).

Almost surely, 2^40244521 is an apocalyptic number.

It is an amenable number.

40244521 is a deficient number, since it is larger than the sum of its proper divisors (1).

40244521 is an equidigital number, since it uses as much as digits as its factorization.

40244521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 40244521 is about 6343.8569498374. The cubic root of 40244521 is about 342.6906491809.

Adding to 40244521 its reverse (12544204), we get a palindrome (52788725).

The spelling of 40244521 in words is "forty million, two hundred forty-four thousand, five hundred twenty-one".