51780278 has 8 divisors (see below), whose sum is σ = 84731400. Its totient is φ = 23536480.

The previous prime is 51780271. The next prime is 51780343. The reversal of 51780278 is 87208715.

51780278 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (51780271) 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, 1176803 + ... + 1176846.

It is an arithmetic number, because the mean of its divisors is an integer number (10591425).

Almost surely, 2^51780278 is an apocalyptic number.

51780278 is a deficient number, since it is larger than the sum of its proper divisors (32951122).

51780278 is a wasteful number, since it uses less digits than its factorization.

51780278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353662.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 51780278 is about 7195.8514437139. The cubic root of 51780278 is about 372.7246588572.

The spelling of 51780278 in words is "fifty-one million, seven hundred eighty thousand, two hundred seventy-eight".