51634218 has 32 divisors (see below), whose sum is σ = 108210816. Its totient is φ = 16394048.

The previous prime is 51634207. The next prime is 51634259. The reversal of 51634218 is 81243615.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 39796 + ... + 41072.

It is an arithmetic number, because the mean of its divisors is an integer number (3381588).

Almost surely, 2^51634218 is an apocalyptic number.

51634218 is an abundant number, since it is smaller than the sum of its proper divisors (56576598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51634218 is a wasteful number, since it uses less digits than its factorization.

51634218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598.

The product of its digits is 5760, while the sum is 30.

The square root of 51634218 is about 7185.6953734486. The cubic root of 51634218 is about 372.3738725875.

The spelling of 51634218 in words is "fifty-one million, six hundred thirty-four thousand, two hundred eighteen".