51078943 has 4 divisors (see below), whose sum is σ = 51451920. Its totient is φ = 50705968.

The previous prime is 51078913. The next prime is 51078949. The reversal of 51078943 is 34987015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51078943 - 2²⁵ = 17524511 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 (51078949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186283 + ... + 186556.

It is an arithmetic number, because the mean of its divisors is an integer number (12862980).

Almost surely, 2^51078943 is an apocalyptic number.

51078943 is a deficient number, since it is larger than the sum of its proper divisors (372977).

51078943 is a wasteful number, since it uses less digits than its factorization.

51078943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372976.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 51078943 is about 7146.9534068720. The cubic root of 51078943 is about 371.0342211418.

The spelling of 51078943 in words is "fifty-one million, seventy-eight thousand, nine hundred forty-three".