51438358121228 has 24 divisors (see below), whose sum is σ = 96980944463760. Its totient is φ = 23731125963840.

The previous prime is 51438358121203. The next prime is 51438358121257. The reversal of 51438358121228 is 82212185383415.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51438358121228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201010643 + ... + 201266378.

It is an arithmetic number, because the mean of its divisors is an integer number (4040872685990).

Almost surely, 2^{51438358121228} is an apocalyptic number.

It is an amenable number.

51438358121228 is a deficient number, since it is larger than the sum of its proper divisors (45542586342532).

51438358121228 is a wasteful number, since it uses less digits than its factorization.

51438358121228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402279497 (or 402279495 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 53.

The spelling of 51438358121228 in words is "fifty-one trillion, four hundred thirty-eight billion, three hundred fifty-eight million, one hundred twenty-one thousand, two hundred twenty-eight".