51878467 has 4 divisors (see below), whose sum is σ = 52857360. Its totient is φ = 50899576.

The previous prime is 51878443. The next prime is 51878471. The reversal of 51878467 is 76487815.

51878467 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76487815 = 5 ⋅15297563.

It is a cyclic number.

It is not a de Polignac number, because 51878467 - 2¹⁹ = 51354179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51878867) 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 3 ways as a sum of consecutive naturals, for example, 489367 + ... + 489472.

It is an arithmetic number, because the mean of its divisors is an integer number (13214340).

Almost surely, 2^51878467 is an apocalyptic number.

51878467 is a deficient number, since it is larger than the sum of its proper divisors (978893).

51878467 is an equidigital number, since it uses as much as digits as its factorization.

51878467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978892.

The product of its digits is 376320, while the sum is 46.

The square root of 51878467 is about 7202.6708240763. The cubic root of 51878467 is about 372.9601046967.

The spelling of 51878467 in words is "fifty-one million, eight hundred seventy-eight thousand, four hundred sixty-seven".