48918581 has 4 divisors (see below), whose sum is σ = 49375872. Its totient is φ = 48461292.

The previous prime is 48918553. The next prime is 48918593. The reversal of 48918581 is 18581984.

48918581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 48918581 - 2⁶ = 48918517 is a prime.

It is a super-2 number, since 2×48918581² = 4786055134107122, 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 (48911581) 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 3 ways as a sum of consecutive naturals, for example, 228485 + ... + 228698.

It is an arithmetic number, because the mean of its divisors is an integer number (12343968).

Almost surely, 2^48918581 is an apocalyptic number.

It is an amenable number.

48918581 is a deficient number, since it is larger than the sum of its proper divisors (457291).

48918581 is a wasteful number, since it uses less digits than its factorization.

48918581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457290.

The product of its digits is 92160, while the sum is 44.

The square root of 48918581 is about 6994.1819392978. The cubic root of 48918581 is about 365.7277804018.

The spelling of 48918581 in words is "forty-eight million, nine hundred eighteen thousand, five hundred eighty-one".