51242777047 has 16 divisors (see below), whose sum is σ = 64374799104. Its totient is φ = 39624624000.

The previous prime is 51242777041. The next prime is 51242777057. The reversal of 51242777047 is 74077724215.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51242777047 - 2⁷ = 51242776919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51242776988 and 51242777006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242777041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2529954 + ... + 2550127.

It is an arithmetic number, because the mean of its divisors is an integer number (4023424944).

Almost surely, 2^51242777047 is an apocalyptic number.

51242777047 is a deficient number, since it is larger than the sum of its proper divisors (13132022057).

51242777047 is a wasteful number, since it uses less digits than its factorization.

51242777047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080230.

The product of its (nonzero) digits is 768320, while the sum is 46.

The spelling of 51242777047 in words is "fifty-one billion, two hundred forty-two million, seven hundred seventy-seven thousand, forty-seven".