51197047047 has 6 divisors (see below), whose sum is σ = 73951290192. Its totient is φ = 34131364692.

The previous prime is 51197046997. The next prime is 51197047079. The reversal of 51197047047 is 74074079115.

51197047047 is a `hidden beast` number, since 51 + 1 + 97 + 0 + 470 + 47 = 666.

It is not a de Polignac number, because 51197047047 - 2¹⁵ = 51197014279 is a prime.

It is a super-2 number, since 2×51197047047² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51197046993 and 51197047011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51197045047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2844280383 + ... + 2844280400.

It is an arithmetic number, because the mean of its divisors is an integer number (12325215032).

Almost surely, 2^51197047047 is an apocalyptic number.

51197047047 is a deficient number, since it is larger than the sum of its proper divisors (22754243145).

51197047047 is a wasteful number, since it uses less digits than its factorization.

51197047047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688560789 (or 5688560786 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The spelling of 51197047047 in words is "fifty-one billion, one hundred ninety-seven million, forty-seven thousand, forty-seven".