51310471851 has 6 divisors (see below), whose sum is σ = 74115126020. Its totient is φ = 34206981228.

The previous prime is 51310471847. The next prime is 51310471957. The reversal of 51310471851 is 15817401315.

It is a happy number.

51310471851 is a `hidden beast` number, since 5 + 131 + 0 + 471 + 8 + 51 = 666.

It is not a de Polignac number, because 51310471851 - 2² = 51310471847 is a prime.

It is a super-3 number, since 3×51310471851³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51310471811) 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, 2850581761 + ... + 2850581778.

Almost surely, 2^51310471851 is an apocalyptic number.

51310471851 is a deficient number, since it is larger than the sum of its proper divisors (22804654169).

51310471851 is a wasteful number, since it uses less digits than its factorization.

51310471851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5701163545 (or 5701163542 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 51310471851 in words is "fifty-one billion, three hundred ten million, four hundred seventy-one thousand, eight hundred fifty-one".