51787875 has 16 divisors (see below), whose sum is σ = 86175648. Its totient is φ = 27620000.

The previous prime is 51787873. The next prime is 51787877. The reversal of 51787875 is 57878715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51787873) and next prime (51787877).

It is not a de Polignac number, because 51787875 - 2¹ = 51787873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51787873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68676 + ... + 69425.

It is an arithmetic number, because the mean of its divisors is an integer number (5385978).

Almost surely, 2^51787875 is an apocalyptic number.

51787875 is a deficient number, since it is larger than the sum of its proper divisors (34387773).

51787875 is a wasteful number, since it uses less digits than its factorization.

51787875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138119 (or 138109 counting only the distinct ones).

The product of its digits is 548800, while the sum is 48.

The square root of 51787875 is about 7196.3792979525. The cubic root of 51787875 is about 372.7428862008.

The spelling of 51787875 in words is "fifty-one million, seven hundred eighty-seven thousand, eight hundred seventy-five".