40105013 has 4 divisors (see below), whose sum is σ = 43190028. Its totient is φ = 37020000.

The previous prime is 40105001. The next prime is 40105049. The reversal of 40105013 is 31050104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2380849 + 37724164 = 1543^2 + 6142^2 .

It is a cyclic number.

It is not a de Polignac number, because 40105013 - 2⁴ = 40104997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40107013) 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, 1542488 + ... + 1542513.

It is an arithmetic number, because the mean of its divisors is an integer number (10797507).

Almost surely, 2^40105013 is an apocalyptic number.

It is an amenable number.

40105013 is a deficient number, since it is larger than the sum of its proper divisors (3085015).

40105013 is a wasteful number, since it uses less digits than its factorization.

40105013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3085014.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 40105013 is about 6332.8518852094. The cubic root of 40105013 is about 342.2942106519.

Adding to 40105013 its reverse (31050104), we get a palindrome (71155117).

The spelling of 40105013 in words is "forty million, one hundred five thousand, thirteen".