51555315541 has 2 divisors, whose sum is σ = 51555315542. Its totient is φ = 51555315540.

The previous prime is 51555315509. The next prime is 51555315547. The reversal of 51555315541 is 14551355515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49608652900 + 1946662641 = 222730^2 + 44121^2 .

It is a cyclic number.

It is not a de Polignac number, because 51555315541 - 2⁵ = 51555315509 is a prime.

It is a super-2 number, since 2×51555315541² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51555315494 and 51555315503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51555315547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25777657770 + 25777657771.

It is an arithmetic number, because the mean of its divisors is an integer number (25777657771).

Almost surely, 2^51555315541 is an apocalyptic number.

It is an amenable number.

51555315541 is a deficient number, since it is larger than the sum of its proper divisors (1).

51555315541 is an equidigital number, since it uses as much as digits as its factorization.

51555315541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 187500, while the sum is 40.

The spelling of 51555315541 in words is "fifty-one billion, five hundred fifty-five million, three hundred fifteen thousand, five hundred forty-one".