51511055524 has 12 divisors (see below), whose sum is σ = 91845184284. Its totient is φ = 25269574304.

The previous prime is 51511055467. The next prime is 51511055587. The reversal of 51511055524 is 42555011515.

It can be written as a sum of positive squares in 2 ways, for example, as 21262889124 + 30248166400 = 145818^2 + 173920^2 .

It is a super-2 number, since 2×51511055524² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51511055524.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 121488127 + ... + 121488550.

It is an arithmetic number, because the mean of its divisors is an integer number (7653765357).

Almost surely, 2^51511055524 is an apocalyptic number.

It is an amenable number.

51511055524 is a deficient number, since it is larger than the sum of its proper divisors (40334128760).

51511055524 is a wasteful number, since it uses less digits than its factorization.

51511055524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242976734 (or 242976732 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 51511055524 in words is "fifty-one billion, five hundred eleven million, fifty-five thousand, five hundred twenty-four".