51535571099 has 2 divisors, whose sum is σ = 51535571100. Its totient is φ = 51535571098.

The previous prime is 51535571039. The next prime is 51535571107. The reversal of 51535571099 is 99017553515.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51535571099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51535571029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25767785549 + 25767785550.

It is an arithmetic number, because the mean of its divisors is an integer number (25767785550).

Almost surely, 2^51535571099 is an apocalyptic number.

51535571099 is a deficient number, since it is larger than the sum of its proper divisors (1).

51535571099 is an equidigital number, since it uses as much as digits as its factorization.

51535571099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1063125, while the sum is 50.

The spelling of 51535571099 in words is "fifty-one billion, five hundred thirty-five million, five hundred seventy-one thousand, ninety-nine".