51283838822891 has 4 divisors (see below), whose sum is σ = 51284094531912. Its totient is φ = 51283583113872.

The previous prime is 51283838822849. The next prime is 51283838822903. The reversal of 51283838822891 is 19822883838215.

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

It is a cyclic number.

It is not a de Polignac number, because 51283838822891 - 2³⁴ = 51266658953707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51283838822291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127553441 + ... + 127954866.

It is an arithmetic number, because the mean of its divisors is an integer number (12821023632978).

Almost surely, 2^{51283838822891} is an apocalyptic number.

51283838822891 is a deficient number, since it is larger than the sum of its proper divisors (255709021).

51283838822891 is a wasteful number, since it uses less digits than its factorization.

51283838822891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255709020.

The product of its digits is 106168320, while the sum is 68.

The spelling of 51283838822891 in words is "fifty-one trillion, two hundred eighty-three billion, eight hundred thirty-eight million, eight hundred twenty-two thousand, eight hundred ninety-one".