51022778 has 32 divisors (see below), whose sum is σ = 82047168. Its totient is φ = 23760000.

The previous prime is 51022759. The next prime is 51022781. The reversal of 51022778 is 87722015.

51022778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 203153 + ... + 203403.

It is an arithmetic number, because the mean of its divisors is an integer number (2563974).

Almost surely, 2^51022778 is an apocalyptic number.

51022778 is a deficient number, since it is larger than the sum of its proper divisors (31024390).

51022778 is a wasteful number, since it uses less digits than its factorization.

51022778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 51022778 is about 7143.0230295023. The cubic root of 51022778 is about 370.8981782605.

The spelling of 51022778 in words is "fifty-one million, twenty-two thousand, seven hundred seventy-eight".