51117696 has 128 divisors (see below), whose sum is σ = 172502400. Its totient is φ = 14598144.

The previous prime is 51117679. The next prime is 51117701. The reversal of 51117696 is 69671115.

It is a happy number.

51117696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×51117696² = 5226037688696832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51117696.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23136 + ... + 25248.

It is an arithmetic number, because the mean of its divisors is an integer number (1347675).

Almost surely, 2^51117696 is an apocalyptic number.

51117696 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51117696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86251200).

51117696 is an abundant number, since it is smaller than the sum of its proper divisors (121384704).

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

51117696 is a wasteful number, since it uses less digits than its factorization.

51117696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143 (or 2125 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 51117696 is about 7149.6640480515. The cubic root of 51117696 is about 371.1280305379.

The spelling of 51117696 in words is "fifty-one million, one hundred seventeen thousand, six hundred ninety-six".