51101136461 has 2 divisors, whose sum is σ = 51101136462. Its totient is φ = 51101136460.

The previous prime is 51101136407. The next prime is 51101136473. The reversal of 51101136461 is 16463110115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50954484361 + 146652100 = 225731^2 + 12110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51101136461 is a prime.

It is a super-2 number, since 2×51101136461² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51101166461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550568230 + 25550568231.

It is an arithmetic number, because the mean of its divisors is an integer number (25550568231).

Almost surely, 2^51101136461 is an apocalyptic number.

It is an amenable number.

51101136461 is a deficient number, since it is larger than the sum of its proper divisors (1).

51101136461 is an equidigital number, since it uses as much as digits as its factorization.

51101136461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 51101136461 its reverse (16463110115), we get a palindrome (67564246576).

The spelling of 51101136461 in words is "fifty-one billion, one hundred one million, one hundred thirty-six thousand, four hundred sixty-one".