51516884 has 6 divisors (see below), whose sum is σ = 90154554. Its totient is φ = 25758440.

The previous prime is 51516877. The next prime is 51516887. The reversal of 51516884 is 48861515.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 394384 = 7150^2 + 628^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6439607 + ... + 6439614.

It is an arithmetic number, because the mean of its divisors is an integer number (15025759).

Almost surely, 2^51516884 is an apocalyptic number.

It is an amenable number.

51516884 is a deficient number, since it is larger than the sum of its proper divisors (38637670).

51516884 is a wasteful number, since it uses less digits than its factorization.

51516884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12879225 (or 12879223 counting only the distinct ones).

The product of its digits is 38400, while the sum is 38.

The square root of 51516884 is about 7177.5263148246. The cubic root of 51516884 is about 372.0915968994.

The spelling of 51516884 in words is "fifty-one million, five hundred sixteen thousand, eight hundred eighty-four".