40244513 has 4 divisors (see below), whose sum is σ = 40273920. Its totient is φ = 40215108.

The previous prime is 40244509. The next prime is 40244521. The reversal of 40244513 is 31544204.

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 40244513 - 2² = 40244509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40247513) 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, 12545 + ... + 15422.

It is an arithmetic number, because the mean of its divisors is an integer number (10068480).

Almost surely, 2^40244513 is an apocalyptic number.

It is an amenable number.

40244513 is a deficient number, since it is larger than the sum of its proper divisors (29407).

40244513 is a wasteful number, since it uses less digits than its factorization.

40244513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29406.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40244513 is about 6343.8563193061. The cubic root of 40244513 is about 342.6906264736.

Adding to 40244513 its reverse (31544204), we get a palindrome (71788717).

The spelling of 40244513 in words is "forty million, two hundred forty-four thousand, five hundred thirteen".