51870383321 has 2 divisors, whose sum is σ = 51870383322. Its totient is φ = 51870383320.

The previous prime is 51870383293. The next prime is 51870383497. The reversal of 51870383321 is 12338307815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38883501721 + 12986881600 = 197189^2 + 113960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51870383321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51870382321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25935191660 + 25935191661.

It is an arithmetic number, because the mean of its divisors is an integer number (25935191661).

Almost surely, 2^51870383321 is an apocalyptic number.

It is an amenable number.

51870383321 is a deficient number, since it is larger than the sum of its proper divisors (1).

51870383321 is an equidigital number, since it uses as much as digits as its factorization.

51870383321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 51870383321 in words is "fifty-one billion, eight hundred seventy million, three hundred eighty-three thousand, three hundred twenty-one".