51512505730351 has 4 divisors (see below), whose sum is σ = 54542653126272. Its totient is φ = 48482358334432.

The previous prime is 51512505730321. The next prime is 51512505730391. The reversal of 51512505730351 is 15303750521515.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51512505730351 is a prime.

It is a super-2 number, since 2×51512505730351² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51512505730298 and 51512505730307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512505730321) 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, 1515073697935 + ... + 1515073697968.

It is an arithmetic number, because the mean of its divisors is an integer number (13635663281568).

Almost surely, 2^{51512505730351} is an apocalyptic number.

51512505730351 is a deficient number, since it is larger than the sum of its proper divisors (3030147395921).

51512505730351 is a wasteful number, since it uses less digits than its factorization.

51512505730351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030147395920.

The product of its (nonzero) digits is 393750, while the sum is 43.

The spelling of 51512505730351 in words is "fifty-one trillion, five hundred twelve billion, five hundred five million, seven hundred thirty thousand, three hundred fifty-one".