51172198 has 16 divisors (see below), whose sum is σ = 95698944. Its totient is φ = 19937160.

The previous prime is 51172133. The next prime is 51172249. The reversal of 51172198 is 89127115.

It is a happy number.

51172198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 165990 + ... + 166297.

It is an arithmetic number, because the mean of its divisors is an integer number (5981184).

Almost surely, 2^51172198 is an apocalyptic number.

51172198 is a deficient number, since it is larger than the sum of its proper divisors (44526746).

51172198 is a wasteful number, since it uses less digits than its factorization.

51172198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332307.

The product of its digits is 5040, while the sum is 34.

The square root of 51172198 is about 7153.4745403894. The cubic root of 51172198 is about 371.2598833466.

The spelling of 51172198 in words is "fifty-one million, one hundred seventy-two thousand, one hundred ninety-eight".