51720935347 has 2 divisors, whose sum is σ = 51720935348. Its totient is φ = 51720935346.

The previous prime is 51720935333. The next prime is 51720935359. The reversal of 51720935347 is 74353902715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51720935347 - 2¹⁵ = 51720902579 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51720935297 and 51720935306.

It is not a weakly prime, because it can be changed into another prime (51720935647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25860467673 + 25860467674.

It is an arithmetic number, because the mean of its divisors is an integer number (25860467674).

Almost surely, 2^51720935347 is an apocalyptic number.

51720935347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51720935347 is an equidigital number, since it uses as much as digits as its factorization.

51720935347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 793800, while the sum is 46.

The spelling of 51720935347 in words is "fifty-one billion, seven hundred twenty million, nine hundred thirty-five thousand, three hundred forty-seven".