51557241850 has 24 divisors (see below), whose sum is σ = 95903086140. Its totient is φ = 20621473920.

The previous prime is 51557241839. The next prime is 51557241913. The reversal of 51557241850 is 5814275515.

It can be written as a sum of positive squares in 6 ways, for example, as 28184030161 + 23373211689 = 167881^2 + 152883^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51557241797 and 51557241806.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 988014 + ... + 1038886.

Almost surely, 2^51557241850 is an apocalyptic number.

51557241850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51557241850 is a deficient number, since it is larger than the sum of its proper divisors (44345844290).

51557241850 is a wasteful number, since it uses less digits than its factorization.

51557241850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71154 (or 71149 counting only the distinct ones).

The product of its (nonzero) digits is 280000, while the sum is 43.

The spelling of 51557241850 in words is "fifty-one billion, five hundred fifty-seven million, two hundred forty-one thousand, eight hundred fifty".