51994392 has 32 divisors (see below), whose sum is σ = 130793280. Its totient is φ = 17223840.

The previous prime is 51994373. The next prime is 51994427. The reversal of 51994392 is 29349915.

51994392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 2734 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (4087290).

Almost surely, 2^51994392 is an apocalyptic number.

It is an amenable number.

51994392 is an abundant number, since it is smaller than the sum of its proper divisors (78798888).

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

51994392 is a wasteful number, since it uses less digits than its factorization.

51994392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463 (or 13459 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 51994392 is about 7210.7136956060. The cubic root of 51994392 is about 373.2376973003.

It can be divided in two parts, 5199 and 4392, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 51994392 in words is "fifty-one million, nine hundred ninety-four thousand, three hundred ninety-two".