51078281222 has 4 divisors (see below), whose sum is σ = 76617421836. Its totient is φ = 25539140610.

The previous prime is 51078281207. The next prime is 51078281237. The reversal of 51078281222 is 22218287015.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51078281207) and next prime (51078281237).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769570304 + ... + 12769570307.

It is an arithmetic number, because the mean of its divisors is an integer number (19154355459).

Almost surely, 2^51078281222 is an apocalyptic number.

51078281222 is a deficient number, since it is larger than the sum of its proper divisors (25539140614).

51078281222 is a wasteful number, since it uses less digits than its factorization.

51078281222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25539140613.

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 51078281222 in words is "fifty-one billion, seventy-eight million, two hundred eighty-one thousand, two hundred twenty-two".