40615013 has 4 divisors (see below), whose sum is σ = 41381388. Its totient is φ = 39848640.

The previous prime is 40614997. The next prime is 40615019. The reversal of 40615013 is 31051604.

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 14010049 + 26604964 = 3743^2 + 5158^2 .

It is a cyclic number.

It is not a de Polignac number, because 40615013 - 2⁴ = 40614997 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 (40615019) 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, 383108 + ... + 383213.

It is an arithmetic number, because the mean of its divisors is an integer number (10345347).

Almost surely, 2^40615013 is an apocalyptic number.

It is an amenable number.

40615013 is a deficient number, since it is larger than the sum of its proper divisors (766375).

40615013 is an equidigital number, since it uses as much as digits as its factorization.

40615013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766374.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40615013 is about 6372.9908990991. The cubic root of 40615013 is about 343.7390445875.

Adding to 40615013 its reverse (31051604), we get a palindrome (71666617).

The spelling of 40615013 in words is "forty million, six hundred fifteen thousand, thirteen".