40004513 has 2 divisors, whose sum is σ = 40004514. Its totient is φ = 40004512.

The previous prime is 40004509. The next prime is 40004533. The reversal of 40004513 is 31540004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 150544 = 6313^2 + 388^2 .

It is a cyclic number.

It is not a de Polignac number, because 40004513 - 2² = 40004509 is a prime.

It is a super-2 number, since 2×40004513² = 3200722120734338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40004491 and 40004500.

It is not a weakly prime, because it can be changed into another prime (40004533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002256 + 20002257.

It is an arithmetic number, because the mean of its divisors is an integer number (20002257).

Almost surely, 2^40004513 is an apocalyptic number.

It is an amenable number.

40004513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40004513 is an equidigital number, since it uses as much as digits as its factorization.

40004513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40004513 is about 6324.9120942508. The cubic root of 40004513 is about 342.0080507207.

Adding to 40004513 its reverse (31540004), we get a palindrome (71544517).

The spelling of 40004513 in words is "forty million, four thousand, five hundred thirteen".