40856513 has 2 divisors, whose sum is σ = 40856514. Its totient is φ = 40856512.

The previous prime is 40856467. The next prime is 40856521. The reversal of 40856513 is 31565804.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24275329 + 16581184 = 4927^2 + 4072^2 .

It is a cyclic number.

It is not a de Polignac number, because 40856513 - 2⁶ = 40856449 is a prime.

It is equal to p_2482637 and since 40856513 and 2482637 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40856513.

It is not a weakly prime, because it can be changed into another prime (40856813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20428256 + 20428257.

It is an arithmetic number, because the mean of its divisors is an integer number (20428257).

Almost surely, 2^40856513 is an apocalyptic number.

It is an amenable number.

40856513 is a deficient number, since it is larger than the sum of its proper divisors (1).

40856513 is an equidigital number, since it uses as much as digits as its factorization.

40856513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 40856513 is about 6391.9099649479. The cubic root of 40856513 is about 344.4189983013.

The spelling of 40856513 in words is "forty million, eight hundred fifty-six thousand, five hundred thirteen".