51831807556 has 27 divisors (see below), whose sum is σ = 92133913599. Its totient is φ = 25514073288.

The previous prime is 51831807509. The next prime is 51831807571. The reversal of 51831807556 is 65570813815.

The square root of 51831807556 is 227666.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 30506395 + ... + 30508093.

Almost surely, 2^51831807556 is an apocalyptic number.

51831807556 is the 227666-th square number.

It is an amenable number.

51831807556 is a deficient number, since it is larger than the sum of its proper divisors (40302106043).

51831807556 is an frugal number, since it uses more digits than its factorization.

51831807556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3536 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 49.

Multiplying 51831807556 by its sum of digits (49), we get a square (2539758570244 = 1593662²).

The spelling of 51831807556 in words is "fifty-one billion, eight hundred thirty-one million, eight hundred seven thousand, five hundred fifty-six".