51107840 has 192 divisors, whose sum is σ = 150958080. Its totient is φ = 16220160.

The previous prime is 51107839. The next prime is 51107857. The reversal of 51107840 is 4870115.

It is a super-2 number, since 2×51107840² = 5224022618931200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1648625 + ... + 1648655.

It is an arithmetic number, because the mean of its divisors is an integer number (786240).

Almost surely, 2^51107840 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 51107840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75479040).

51107840 is an abundant number, since it is smaller than the sum of its proper divisors (99850240).

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

51107840 is a wasteful number, since it uses less digits than its factorization.

51107840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 51107840 is about 7148.9747516689. The cubic root of 51107840 is about 371.1041766134.

Adding to 51107840 its reverse (4870115), we get a palindrome (55977955).

The spelling of 51107840 in words is "fifty-one million, one hundred seven thousand, eight hundred forty".