51311555530 has 8 divisors (see below), whose sum is σ = 92360799972. Its totient is φ = 20524622208.

The previous prime is 51311555467. The next prime is 51311555543. The reversal of 51311555530 is 3555511315.

It can be written as a sum of positive squares in 2 ways, for example, as 49359064561 + 1952490969 = 222169^2 + 44187^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2565577767 + ... + 2565577786.

Almost surely, 2^51311555530 is an apocalyptic number.

51311555530 is a deficient number, since it is larger than the sum of its proper divisors (41049244442).

51311555530 is a wasteful number, since it uses less digits than its factorization.

51311555530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131155560.

The product of its (nonzero) digits is 28125, while the sum is 34.

It can be divided in two parts, 51311 and 555530, that added together give a square (606841 = 779²).

The spelling of 51311555530 in words is "fifty-one billion, three hundred eleven million, five hundred fifty-five thousand, five hundred thirty".