51508198 has 16 divisors (see below), whose sum is σ = 93494304. Its totient is φ = 20776320.

The previous prime is 51508169. The next prime is 51508229. The reversal of 51508198 is 89180515.

It is a super-2 number, since 2×51508198² = 5306188922414408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107973 + ... + 108448.

It is an arithmetic number, because the mean of its divisors is an integer number (5843394).

Almost surely, 2^51508198 is an apocalyptic number.

51508198 is a deficient number, since it is larger than the sum of its proper divisors (41986106).

51508198 is a wasteful number, since it uses less digits than its factorization.

51508198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216447.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 51508198 is about 7176.9212061998. The cubic root of 51508198 is about 372.0706835663.

The spelling of 51508198 in words is "fifty-one million, five hundred eight thousand, one hundred ninety-eight".