51550100051 has 2 divisors, whose sum is σ = 51550100052. Its totient is φ = 51550100050.

The previous prime is 51550100047. The next prime is 51550100081. The reversal of 51550100051 is 15000105515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51550100051 - 2² = 51550100047 is a prime.

It is a super-2 number, since 2×51550100051² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51550100081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25775050025 + 25775050026.

It is an arithmetic number, because the mean of its divisors is an integer number (25775050026).

Almost surely, 2^51550100051 is an apocalyptic number.

51550100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550100051 is an equidigital number, since it uses as much as digits as its factorization.

51550100051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 625, while the sum is 23.

Adding to 51550100051 its reverse (15000105515), we get a palindrome (66550205566).

The spelling of 51550100051 in words is "fifty-one billion, five hundred fifty million, one hundred thousand, fifty-one".