51544416 has 192 divisors, whose sum is σ = 178053120. Its totient is φ = 12648960.

The previous prime is 51544399. The next prime is 51544417. The reversal of 51544416 is 61444515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51544417) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140265 + ... + 140631.

It is an arithmetic number, because the mean of its divisors is an integer number (927360).

Almost surely, 2^51544416 is an apocalyptic number.

51544416 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 51544416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89026560).

51544416 is an abundant number, since it is smaller than the sum of its proper divisors (126508704).

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

51544416 is a wasteful number, since it uses less digits than its factorization.

51544416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 409 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 51544416 is about 7179.4439896137. The cubic root of 51544416 is about 372.1578703269.

Subtracting 51544416 from its reverse (61444515), we obtain a palindrome (9900099).

The spelling of 51544416 in words is "fifty-one million, five hundred forty-four thousand, four hundred sixteen".