51512351573 has 2 divisors, whose sum is σ = 51512351574. Its totient is φ = 51512351572.

The previous prime is 51512351549. The next prime is 51512351633. The reversal of 51512351573 is 37515321515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45668972209 + 5843379364 = 213703^2 + 76442^2 .

It is a cyclic number.

It is not a de Polignac number, because 51512351573 - 2²⁴ = 51495574357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51512351173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756175786 + 25756175787.

It is an arithmetic number, because the mean of its divisors is an integer number (25756175787).

Almost surely, 2^51512351573 is an apocalyptic number.

It is an amenable number.

51512351573 is a deficient number, since it is larger than the sum of its proper divisors (1).

51512351573 is an equidigital number, since it uses as much as digits as its factorization.

51512351573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78750, while the sum is 38.

The spelling of 51512351573 in words is "fifty-one billion, five hundred twelve million, three hundred fifty-one thousand, five hundred seventy-three".