51789281211529 has 3 divisors (see below), whose sum is σ = 51789288408007. Its totient is φ = 51789274015052.

The previous prime is 51789281211523. The next prime is 51789281211533. The reversal of 51789281211529 is 92511218298715.

The square root of 51789281211529 is 7196477.

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.

It can be written as a sum of positive squares in only one way, i.e., 32450852799225 + 19338428412304 = 5696565^2 + 4397548^2 .

It is not a de Polignac number, because 51789281211529 - 2¹⁷ = 51789281080457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51789281211523) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3598239 + ... + 10794715.

Almost surely, 2^{51789281211529} is an apocalyptic number.

51789281211529 is the 7196477-th square number.

51789281211529 is the 3598239-th centered octagonal number.

It is an amenable number.

51789281211529 is a deficient number, since it is larger than the sum of its proper divisors (7196478).

51789281211529 is an frugal number, since it uses more digits than its factorization.

51789281211529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14392954 (or 7196477 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 61.

The spelling of 51789281211529 in words is "fifty-one trillion, seven hundred eighty-nine billion, two hundred eighty-one million, two hundred eleven thousand, five hundred twenty-nine".