40512517 has 2 divisors, whose sum is σ = 40512518. Its totient is φ = 40512516.

The previous prime is 40512497. The next prime is 40512539. The reversal of 40512517 is 71521504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37933281 + 2579236 = 6159^2 + 1606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40512517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40512491 and 40512500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40512587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256258 + 20256259.

It is an arithmetic number, because the mean of its divisors is an integer number (20256259).

Almost surely, 2^40512517 is an apocalyptic number.

It is an amenable number.

40512517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40512517 is an equidigital number, since it uses as much as digits as its factorization.

40512517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 40512517 is about 6364.9443831034. The cubic root of 40512517 is about 343.4496478581.

The spelling of 40512517 in words is "forty million, five hundred twelve thousand, five hundred seventeen".