41491581 has 4 divisors (see below), whose sum is σ = 55322112. Its totient is φ = 27661052.

The previous prime is 41491579. The next prime is 41491601. The reversal of 41491581 is 18519414.

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 41491581 - 2¹ = 41491579 is a prime.

It is a super-2 number, since 2×41491581² = 3443102587759122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41491531) 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, 6915261 + ... + 6915266.

It is an arithmetic number, because the mean of its divisors is an integer number (13830528).

Almost surely, 2^41491581 is an apocalyptic number.

It is an amenable number.

41491581 is a deficient number, since it is larger than the sum of its proper divisors (13830531).

41491581 is a wasteful number, since it uses less digits than its factorization.

41491581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13830530.

The product of its digits is 5760, while the sum is 33.

The square root of 41491581 is about 6441.3958890911. The cubic root of 41491581 is about 346.1943649397.

The spelling of 41491581 in words is "forty-one million, four hundred ninety-one thousand, five hundred eighty-one".