40565513 has 4 divisors (see below), whose sum is σ = 42700560. Its totient is φ = 38430468.

The previous prime is 40565477. The next prime is 40565521. The reversal of 40565513 is 31556504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40565513 - 2⁸ = 40565257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40565543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067495 + ... + 1067532.

It is an arithmetic number, because the mean of its divisors is an integer number (10675140).

Almost surely, 2^40565513 is an apocalyptic number.

It is an amenable number.

40565513 is a deficient number, since it is larger than the sum of its proper divisors (2135047).

40565513 is a wasteful number, since it uses less digits than its factorization.

40565513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135046.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 40565513 is about 6369.1061382269. The cubic root of 40565513 is about 343.5993425531.

Subtracting from 40565513 its reverse (31556504), we obtain a palindrome (9009009).

The spelling of 40565513 in words is "forty million, five hundred sixty-five thousand, five hundred thirteen".