51797198 has 32 divisors (see below), whose sum is σ = 85536000. Its totient is φ = 23425920.

The previous prime is 51797191. The next prime is 51797203. The reversal of 51797198 is 89179715.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51797191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103553 + ... + 104051.

It is an arithmetic number, because the mean of its divisors is an integer number (2673000).

Almost surely, 2^51797198 is an apocalyptic number.

51797198 is a deficient number, since it is larger than the sum of its proper divisors (33738802).

51797198 is a wasteful number, since it uses less digits than its factorization.

51797198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632.

The product of its digits is 158760, while the sum is 47.

The square root of 51797198 is about 7197.0270250986. The cubic root of 51797198 is about 372.7652522689.

The spelling of 51797198 in words is "fifty-one million, seven hundred ninety-seven thousand, one hundred ninety-eight".