51521764273 has 24 divisors (see below), whose sum is σ = 60771501672. Its totient is φ = 43547341824.

The previous prime is 51521764237. The next prime is 51521764303. The reversal of 51521764273 is 37246712515.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11416495104 + 40105269169 = 106848^2 + 200263^2 .

It is not a de Polignac number, because 51521764273 - 2¹³ = 51521756081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51521764373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1297015 + ... + 1336147.

It is an arithmetic number, because the mean of its divisors is an integer number (2532145903).

Almost surely, 2^51521764273 is an apocalyptic number.

It is an amenable number.

51521764273 is a deficient number, since it is larger than the sum of its proper divisors (9249737399).

51521764273 is a wasteful number, since it uses less digits than its factorization.

51521764273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39521 (or 39514 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The spelling of 51521764273 in words is "fifty-one billion, five hundred twenty-one million, seven hundred sixty-four thousand, two hundred seventy-three".