51973512529 has 3 divisors (see below), whose sum is σ = 51973740507. Its totient is φ = 51973284552.

The previous prime is 51973512511. The next prime is 51973512541. The reversal of 51973512529 is 92521537915.

The square root of 51973512529 is 227977.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92521537915 = 5 ⋅18504307583.

It can be written as a sum of positive squares in only one way, i.e., 1370110225 + 50603402304 = 37015^2 + 224952^2 .

It is not a de Polignac number, because 51973512529 - 2¹⁹ = 51972988241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51973522529) 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 in 2 ways as a sum of consecutive naturals, for example, 113989 + ... + 341965.

It is an arithmetic number, because the mean of its divisors is an integer number (17324580169).

Almost surely, 2^51973512529 is an apocalyptic number.

51973512529 is the 227977-th square number.

51973512529 is the 113989-th centered octagonal number.

It is an amenable number.

51973512529 is a deficient number, since it is larger than the sum of its proper divisors (227978).

51973512529 is an frugal number, since it uses more digits than its factorization.

51973512529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455954 (or 227977 counting only the distinct ones).

The product of its digits is 850500, while the sum is 49.

Multiplying 51973512529 by its sum of digits (49), we get a square (2546702113921 = 1595839²).

The spelling of 51973512529 in words is "fifty-one billion, nine hundred seventy-three million, five hundred twelve thousand, five hundred twenty-nine".