51515198 has 16 divisors (see below), whose sum is σ = 88473600. Its totient is φ = 22037496.

The previous prime is 51515159. The next prime is 51515209. The reversal of 51515198 is 89151515.

51515198 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, 5315 + ... + 11457.

It is an arithmetic number, because the mean of its divisors is an integer number (5529600).

Almost surely, 2^51515198 is an apocalyptic number.

51515198 is a deficient number, since it is larger than the sum of its proper divisors (36958402).

51515198 is a wasteful number, since it uses less digits than its factorization.

51515198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6751.

The product of its digits is 9000, while the sum is 35.

The square root of 51515198 is about 7177.4088639285. The cubic root of 51515198 is about 372.0875376912.

The spelling of 51515198 in words is "fifty-one million, five hundred fifteen thousand, one hundred ninety-eight".