51651231747 has 8 divisors (see below), whose sum is σ = 68909727744. Its totient is φ = 34413445128.

The previous prime is 51651231743. The next prime is 51651231763. The reversal of 51651231747 is 74713215615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51651231747 - 2² = 51651231743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51651231699 and 51651231708.

It is not an unprimeable number, because it can be changed into a prime (51651231743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5171523 + ... + 5181500.

It is an arithmetic number, because the mean of its divisors is an integer number (8613715968).

Almost surely, 2^51651231747 is an apocalyptic number.

51651231747 is a deficient number, since it is larger than the sum of its proper divisors (17258495997).

51651231747 is a wasteful number, since it uses less digits than its factorization.

51651231747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10354689.

The product of its digits is 176400, while the sum is 42.

The spelling of 51651231747 in words is "fifty-one billion, six hundred fifty-one million, two hundred thirty-one thousand, seven hundred forty-seven".