51188697 has 12 divisors (see below), whose sum is σ = 84502080. Its totient is φ = 29250648.

The previous prime is 51188681. The next prime is 51188701. The reversal of 51188697 is 79688115.

51188697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51188697 - 2⁴ = 51188681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51188197) 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 11 ways as a sum of consecutive naturals, for example, 406197 + ... + 406322.

It is an arithmetic number, because the mean of its divisors is an integer number (7041840).

Almost surely, 2^51188697 is an apocalyptic number.

It is an amenable number.

51188697 is a deficient number, since it is larger than the sum of its proper divisors (33313383).

51188697 is a wasteful number, since it uses less digits than its factorization.

51188697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812532 (or 812529 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 51188697 is about 7154.6276632680. The cubic root of 51188697 is about 371.2997797412.

The spelling of 51188697 in words is "fifty-one million, one hundred eighty-eight thousand, six hundred ninety-seven".