49581581 has 12 divisors (see below), whose sum is σ = 57806208. Its totient is φ = 42403032.

The previous prime is 49581577. The next prime is 49581599. The reversal of 49581581 is 18518594.

49581581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49581581 - 2² = 49581577 is a prime.

It is a super-2 number, since 2×49581581² = 4916666348919122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49581481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28910 + ... + 30576.

It is an arithmetic number, because the mean of its divisors is an integer number (4817184).

Almost surely, 2^49581581 is an apocalyptic number.

It is an amenable number.

49581581 is a deficient number, since it is larger than the sum of its proper divisors (8224627).

49581581 is a wasteful number, since it uses less digits than its factorization.

49581581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288 (or 2281 counting only the distinct ones).

The product of its digits is 57600, while the sum is 41.

The square root of 49581581 is about 7041.4189621127. The cubic root of 49581581 is about 367.3726240348.

The spelling of 49581581 in words is "forty-nine million, five hundred eighty-one thousand, five hundred eighty-one".