51997544 has 16 divisors (see below), whose sum is σ = 97674720. Its totient is φ = 25950960.

The previous prime is 51997541. The next prime is 51997597. The reversal of 51997544 is 44579915.

51997544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51997495 and 51997504.

It is not an unprimeable number, because it can be changed into a prime (51997541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124 + ... + 10259.

It is an arithmetic number, because the mean of its divisors is an integer number (6104670).

Almost surely, 2^51997544 is an apocalyptic number.

It is an amenable number.

51997544 is a deficient number, since it is larger than the sum of its proper divisors (45677176).

51997544 is a wasteful number, since it uses less digits than its factorization.

51997544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11960 (or 11956 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 51997544 is about 7210.9322559569. The cubic root of 51997544 is about 373.2452392768.

The spelling of 51997544 in words is "fifty-one million, nine hundred ninety-seven thousand, five hundred forty-four".