51392198 has 16 divisors (see below), whose sum is σ = 90565776. Its totient is φ = 21563040.

The previous prime is 51392191. The next prime is 51392213. The reversal of 51392198 is 89129315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51392191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89561 + ... + 90132.

It is an arithmetic number, because the mean of its divisors is an integer number (5660361).

Almost surely, 2^51392198 is an apocalyptic number.

51392198 is a deficient number, since it is larger than the sum of its proper divisors (39173578).

51392198 is a wasteful number, since it uses less digits than its factorization.

51392198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179719.

The product of its digits is 19440, while the sum is 38.

The square root of 51392198 is about 7168.8351912985. The cubic root of 51392198 is about 371.7911640498.

It can be divided in two parts, 5139 and 2198, that added together give a palindrome (7337).

The spelling of 51392198 in words is "fifty-one million, three hundred ninety-two thousand, one hundred ninety-eight".