51878243 has 8 divisors (see below), whose sum is σ = 54017376. Its totient is φ = 49780800.

The previous prime is 51878231. The next prime is 51878251. The reversal of 51878243 is 34287815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51878243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51878197 and 51878206.

It is not an unprimeable number, because it can be changed into a prime (51878263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7871 + ... + 12872.

It is an arithmetic number, because the mean of its divisors is an integer number (6752172).

Almost surely, 2^51878243 is an apocalyptic number.

51878243 is a deficient number, since it is larger than the sum of its proper divisors (2139133).

51878243 is a wasteful number, since it uses less digits than its factorization.

51878243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20845.

The product of its digits is 53760, while the sum is 38.

The square root of 51878243 is about 7202.6552742721. The cubic root of 51878243 is about 372.9595679089.

The spelling of 51878243 in words is "fifty-one million, eight hundred seventy-eight thousand, two hundred forty-three".