51172418 has 8 divisors (see below), whose sum is σ = 83736720. Its totient is φ = 23260180.

The previous prime is 51172403. The next prime is 51172421. The reversal of 51172418 is 81427115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162988 + ... + 1163031.

It is an arithmetic number, because the mean of its divisors is an integer number (10467090).

Almost surely, 2^51172418 is an apocalyptic number.

51172418 is a deficient number, since it is larger than the sum of its proper divisors (32564302).

51172418 is a wasteful number, since it uses less digits than its factorization.

51172418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326032.

The product of its digits is 2240, while the sum is 29.

The square root of 51172418 is about 7153.4899175158. The cubic root of 51172418 is about 371.2604153872.

The spelling of 51172418 in words is "fifty-one million, one hundred seventy-two thousand, four hundred eighteen".