51758170213 has 2 divisors, whose sum is σ = 51758170214. Its totient is φ = 51758170212.

The previous prime is 51758170207. The next prime is 51758170253. The reversal of 51758170213 is 31207185715.

It is an a-pointer prime, because the next prime (51758170253) can be obtained adding 51758170213 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44073543969 + 7684626244 = 209937^2 + 87662^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51758170213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51758170253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25879085106 + 25879085107.

It is an arithmetic number, because the mean of its divisors is an integer number (25879085107).

Almost surely, 2^51758170213 is an apocalyptic number.

It is an amenable number.

51758170213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51758170213 is an equidigital number, since it uses as much as digits as its factorization.

51758170213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 51758170213 in words is "fifty-one billion, seven hundred fifty-eight million, one hundred seventy thousand, two hundred thirteen".