51272430867529 has 9 divisors (see below), whose sum is σ = 53101626816693. Its totient is φ = 49504215516672.

The previous prime is 51272430867503. The next prime is 51272430867611. The reversal of 51272430867529 is 92576803427215.

It is a happy number.

The square root of 51272430867529 is 7160477.

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

It can be written as a sum of positive squares in 4 ways, for example, as 787824884025 + 50484605983504 = 887595^2 + 7105252^2 .

It is not a de Polignac number, because 51272430867529 - 2¹⁵ = 51272430834761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51272430861529) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 207530377 + ... + 207777289.

It is a 1-persistent number, because it is pandigital, but 2⋅51272430867529 = 102544861735058 is not.

Almost surely, 2^{51272430867529} is an apocalyptic number.

51272430867529 is the 7160477-th square number.

51272430867529 is the 3580239-th centered octagonal number.

It is an amenable number.

51272430867529 is a deficient number, since it is larger than the sum of its proper divisors (1829195949164).

51272430867529 is an frugal number, since it uses more digits than its factorization.

51272430867529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493884 (or 246942 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 51272430867529 in words is "fifty-one trillion, two hundred seventy-two billion, four hundred thirty million, eight hundred sixty-seven thousand, five hundred twenty-nine".