51978459238271 has 2 divisors, whose sum is σ = 51978459238272. Its totient is φ = 51978459238270.

The previous prime is 51978459238261. The next prime is 51978459238319. The reversal of 51978459238271 is 17283295487915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51978459238271 - 2¹⁰ = 51978459237247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51978459238195 and 51978459238204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51978459238261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25989229619135 + 25989229619136.

It is an arithmetic number, because the mean of its divisors is an integer number (25989229619136).

Almost surely, 2^{51978459238271} is an apocalyptic number.

51978459238271 is a deficient number, since it is larger than the sum of its proper divisors (1).

51978459238271 is an equidigital number, since it uses as much as digits as its factorization.

51978459238271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 304819200, while the sum is 71.

The spelling of 51978459238271 in words is "fifty-one trillion, nine hundred seventy-eight billion, four hundred fifty-nine million, two hundred thirty-eight thousand, two hundred seventy-one".