41581513 has 4 divisors (see below), whose sum is σ = 41600020. Its totient is φ = 41563008.

The previous prime is 41581487. The next prime is 41581517. The reversal of 41581513 is 31518514.

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 27541504 + 14040009 = 5248^2 + 3747^2 .

It is a cyclic number.

It is not a de Polignac number, because 41581513 - 2¹³ = 41573321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41581517) 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, 5328 + ... + 10561.

It is an arithmetic number, because the mean of its divisors is an integer number (10400005).

Almost surely, 2^41581513 is an apocalyptic number.

It is an amenable number.

41581513 is a deficient number, since it is larger than the sum of its proper divisors (18507).

41581513 is a wasteful number, since it uses less digits than its factorization.

41581513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18506.

The product of its digits is 2400, while the sum is 28.

The square root of 41581513 is about 6448.3728955450. The cubic root of 41581513 is about 346.4443070878. Note that the first 3 decimals are identical.

It can be divided in two parts, 4158 and 1513, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 41581513 in words is "forty-one million, five hundred eighty-one thousand, five hundred thirteen".