48681581 has 4 divisors (see below), whose sum is σ = 52426332. Its totient is φ = 44936832.

The previous prime is 48681571. The next prime is 48681623. The reversal of 48681581 is 18518684.

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 11055625 + 37625956 = 3325^2 + 6134^2 .

It is a cyclic number.

It is not a de Polignac number, because 48681581 - 2¹⁰ = 48680557 is a prime.

It is a super-2 number, since 2×48681581² = 4739792657319122, 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 (48681541) 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, 1872356 + ... + 1872381.

It is an arithmetic number, because the mean of its divisors is an integer number (13106583).

Almost surely, 2^48681581 is an apocalyptic number.

It is an amenable number.

48681581 is a deficient number, since it is larger than the sum of its proper divisors (3744751).

48681581 is a wasteful number, since it uses less digits than its factorization.

48681581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744750.

The product of its digits is 61440, while the sum is 41.

The square root of 48681581 is about 6977.2187152188. The cubic root of 48681581 is about 365.1361998743.

The spelling of 48681581 in words is "forty-eight million, six hundred eighty-one thousand, five hundred eighty-one".