51878538 has 12 divisors (see below), whose sum is σ = 112403538. Its totient is φ = 17292840.

The previous prime is 51878527. The next prime is 51878557. The reversal of 51878538 is 83587815.

It is a happy number.

51878538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 46416969 + 5461569 = 6813^2 + 2337^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51878493 and 51878502.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1441053 + ... + 1441088.

Almost surely, 2^51878538 is an apocalyptic number.

51878538 is an abundant number, since it is smaller than the sum of its proper divisors (60525000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51878538 is a wasteful number, since it uses less digits than its factorization.

51878538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882149 (or 2882146 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 51878538 is about 7202.6757528019. The cubic root of 51878538 is about 372.9602748389.

The spelling of 51878538 in words is "fifty-one million, eight hundred seventy-eight thousand, five hundred thirty-eight".