51948687 has 16 divisors (see below), whose sum is σ = 81002240. Its totient is φ = 28994112.

The previous prime is 51948683. The next prime is 51948691. The reversal of 51948687 is 78684915.

51948687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51948683) and next prime (51948691).

It is not a de Polignac number, because 51948687 - 2² = 51948683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51948683) 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 15 ways as a sum of consecutive naturals, for example, 27862 + ... + 29667.

It is an arithmetic number, because the mean of its divisors is an integer number (5062640).

Almost surely, 2^51948687 is an apocalyptic number.

51948687 is a deficient number, since it is larger than the sum of its proper divisors (29053553).

51948687 is a wasteful number, since it uses less digits than its factorization.

51948687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57582.

The product of its digits is 483840, while the sum is 48.

The square root of 51948687 is about 7207.5437563708. The cubic root of 51948687 is about 373.1283019777.

The spelling of 51948687 in words is "fifty-one million, nine hundred forty-eight thousand, six hundred eighty-seven".