51948581 has 4 divisors (see below), whose sum is σ = 51972492. Its totient is φ = 51924672.

The previous prime is 51948577. The next prime is 51948623. The reversal of 51948581 is 18584915.

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 29528356 + 22420225 = 5434^2 + 4735^2 .

It is a cyclic number.

It is not a de Polignac number, because 51948581 - 2² = 51948577 is a prime.

It is a super-2 number, since 2×51948581² = 5397310135827122, 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 (51948521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8330 + ... + 13163.

It is an arithmetic number, because the mean of its divisors is an integer number (12993123).

Almost surely, 2^51948581 is an apocalyptic number.

It is an amenable number.

51948581 is a deficient number, since it is larger than the sum of its proper divisors (23911).

51948581 is a wasteful number, since it uses less digits than its factorization.

51948581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23910.

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

The square root of 51948581 is about 7207.5364029604. The cubic root of 51948581 is about 373.1280481912.

The spelling of 51948581 in words is "fifty-one million, nine hundred forty-eight thousand, five hundred eighty-one".