51275317248 has 330 divisors, whose sum is σ = 156722660514. Its totient is φ = 16769286144.

The previous prime is 51275317229. The next prime is 51275317253. The reversal of 51275317248 is 84271357215.

51275317248 is a `hidden beast` number, since 5 + 1 + 2 + 7 + 531 + 72 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 47405481984 + 3869835264 = 217728^2 + 62208^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 967458790 + ... + 967458842.

Almost surely, 2^51275317248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51275317248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78361330257).

51275317248 is an abundant number, since it is smaller than the sum of its proper divisors (105447343266).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51275317248 is an frugal number, since it uses more digits than its factorization.

51275317248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 58 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The spelling of 51275317248 in words is "fifty-one billion, two hundred seventy-five million, three hundred seventeen thousand, two hundred forty-eight".