51348884434261 has 4 divisors (see below), whose sum is σ = 51350162159500. Its totient is φ = 51347606709024.

The previous prime is 51348884434231. The next prime is 51348884434273. The reversal of 51348884434261 is 16243448884315.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1776371833636 + 49572512600625 = 1332806^2 + 7040775^2 .

It is a cyclic number.

It is not a de Polignac number, because 51348884434261 - 2²³ = 51348876045653 is a prime.

It is a super-2 number, since 2×51348884434261² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51348884434261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51348884434231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638802336 + ... + 638882713.

It is an arithmetic number, because the mean of its divisors is an integer number (12837540539875).

Almost surely, 2^{51348884434261} is an apocalyptic number.

It is an amenable number.

51348884434261 is a deficient number, since it is larger than the sum of its proper divisors (1277725239).

51348884434261 is a wasteful number, since it uses less digits than its factorization.

51348884434261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277725238.

The product of its digits is 70778880, while the sum is 61.

The spelling of 51348884434261 in words is "fifty-one trillion, three hundred forty-eight billion, eight hundred eighty-four million, four hundred thirty-four thousand, two hundred sixty-one".