51943894 has 8 divisors (see below), whose sum is σ = 79078968. Its totient is φ = 25584240.

The previous prime is 51943861. The next prime is 51943939. The reversal of 51943894 is 49834915.

It is a happy number.

51943894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51943894.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 193687 + ... + 193954.

It is an arithmetic number, because the mean of its divisors is an integer number (9884871).

Almost surely, 2^51943894 is an apocalyptic number.

51943894 is a deficient number, since it is larger than the sum of its proper divisors (27135074).

51943894 is a wasteful number, since it uses less digits than its factorization.

51943894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387710.

The product of its digits is 155520, while the sum is 43.

The square root of 51943894 is about 7207.2112498525. The cubic root of 51943894 is about 373.1168261731.

The spelling of 51943894 in words is "fifty-one million, nine hundred forty-three thousand, eight hundred ninety-four".