51643164 has 24 divisors (see below), whose sum is σ = 121033360. Its totient is φ = 17138304.

The previous prime is 51643103. The next prime is 51643183. The reversal of 51643164 is 46134615.

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, 6649 + ... + 12144.

Almost surely, 2^51643164 is an apocalyptic number.

It is an amenable number.

51643164 is an abundant number, since it is smaller than the sum of its proper divisors (69390196).

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

51643164 is a wasteful number, since it uses less digits than its factorization.

51643164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19029 (or 19027 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 51643164 is about 7186.3178332161. The cubic root of 51643164 is about 372.3953768304.

Adding to 51643164 its reverse (46134615), we get a palindrome (97777779).

The spelling of 51643164 in words is "fifty-one million, six hundred forty-three thousand, one hundred sixty-four".