51513100237 has 2 divisors, whose sum is σ = 51513100238. Its totient is φ = 51513100236.

The previous prime is 51513100097. The next prime is 51513100259. The reversal of 51513100237 is 73200131515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39815812521 + 11697287716 = 199539^2 + 108154^2 .

It is a cyclic number.

It is not a de Polignac number, because 51513100237 - 2¹⁵ = 51513067469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51513100277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756550118 + 25756550119.

It is an arithmetic number, because the mean of its divisors is an integer number (25756550119).

Almost surely, 2^51513100237 is an apocalyptic number.

It is an amenable number.

51513100237 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513100237 is an equidigital number, since it uses as much as digits as its factorization.

51513100237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 28.

The spelling of 51513100237 in words is "fifty-one billion, five hundred thirteen million, one hundred thousand, two hundred thirty-seven".