51511696 has 20 divisors (see below), whose sum is σ = 102502492. Its totient is φ = 25059456.

The previous prime is 51511693. The next prime is 51511741. The reversal of 51511696 is 69611515.

It can be written as a sum of positive squares in 2 ways, for example, as 31584400 + 19927296 = 5620^2 + 4464^2 .

It is not an unprimeable number, because it can be changed into a prime (51511693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42915 + ... + 44098.

Almost surely, 2^51511696 is an apocalyptic number.

It is an amenable number.

51511696 is a deficient number, since it is larger than the sum of its proper divisors (50990796).

51511696 is a wasteful number, since it uses less digits than its factorization.

51511696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87058 (or 87052 counting only the distinct ones).

The product of its digits is 8100, while the sum is 34.

The square root of 51511696 is about 7177.1648998752. The cubic root of 51511696 is about 372.0791060042.

The spelling of 51511696 in words is "fifty-one million, five hundred eleven thousand, six hundred ninety-six".