51103872 has 192 divisors, whose sum is σ = 160392960. Its totient is φ = 16174080.

The previous prime is 51103849. The next prime is 51103873. The reversal of 51103872 is 27830115.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×51103872² = 5223211466784768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51103873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 964198 + ... + 964250.

It is an arithmetic number, because the mean of its divisors is an integer number (835380).

Almost surely, 2^51103872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51103872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80196480).

51103872 is an abundant number, since it is smaller than the sum of its proper divisors (109289088).

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

51103872 is an equidigital number, since it uses as much as digits as its factorization.

51103872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 51103872 is about 7148.6972239703. The cubic root of 51103872 is about 371.0945722195.

Adding to 51103872 its reverse (27830115), we get a palindrome (78933987).

The spelling of 51103872 in words is "fifty-one million, one hundred three thousand, eight hundred seventy-two".