48391681 has 4 divisors (see below), whose sum is σ = 52114132. Its totient is φ = 44669232.

The previous prime is 48391663. The next prime is 48391697. The reversal of 48391681 is 18619384.

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 19501056 + 28890625 = 4416^2 + 5375^2 .

It is a cyclic number.

It is not a de Polignac number, because 48391681 - 2⁵ = 48391649 is a prime.

It is a super-2 number, since 2×48391681² = 4683509580011522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (48391601) 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, 1861206 + ... + 1861231.

It is an arithmetic number, because the mean of its divisors is an integer number (13028533).

Almost surely, 2^48391681 is an apocalyptic number.

It is an amenable number.

48391681 is a deficient number, since it is larger than the sum of its proper divisors (3722451).

48391681 is a wasteful number, since it uses less digits than its factorization.

48391681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722450.

The product of its digits is 41472, while the sum is 40.

The square root of 48391681 is about 6956.4129405894. The cubic root of 48391681 is about 364.4099580452.

The spelling of 48391681 in words is "forty-eight million, three hundred ninety-one thousand, six hundred eighty-one".