51428218228 has 24 divisors (see below), whose sum is σ = 92783319552. Its totient is φ = 24923984544.

The previous prime is 51428218199. The next prime is 51428218241. The reversal of 51428218228 is 82281282415.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621700 + ... + 699547.

It is an arithmetic number, because the mean of its divisors is an integer number (3865971648).

Almost surely, 2^51428218228 is an apocalyptic number.

It is an amenable number.

51428218228 is a deficient number, since it is larger than the sum of its proper divisors (41355101324).

51428218228 is a wasteful number, since it uses less digits than its factorization.

51428218228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321551 (or 1321549 counting only the distinct ones).

The product of its digits is 163840, while the sum is 43.

The spelling of 51428218228 in words is "fifty-one billion, four hundred twenty-eight million, two hundred eighteen thousand, two hundred twenty-eight".