51243771248 has 20 divisors (see below), whose sum is σ = 104510323560. Its totient is φ = 24273365184.

The previous prime is 51243771233. The next prime is 51243771259. The reversal of 51243771248 is 84217734215.

It is a junction number, because it is equal to n+sod(n) for n = 51243771199 and 51243771208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84282215 + ... + 84282822.

It is an arithmetic number, because the mean of its divisors is an integer number (5225516178).

Almost surely, 2^51243771248 is an apocalyptic number.

It is an amenable number.

51243771248 is an abundant number, since it is smaller than the sum of its proper divisors (53266552312).

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

51243771248 is a wasteful number, since it uses less digits than its factorization.

51243771248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168565064 (or 168565058 counting only the distinct ones).

The product of its digits is 376320, while the sum is 44.

The spelling of 51243771248 in words is "fifty-one billion, two hundred forty-three million, seven hundred seventy-one thousand, two hundred forty-eight".