51488416 has 48 divisors (see below), whose sum is σ = 118238400. Its totient is φ = 22061760.

The previous prime is 51488413. The next prime is 51488441. The reversal of 51488416 is 61488415.

It is not an unprimeable number, because it can be changed into a prime (51488413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8631 + ... + 13321.

It is an arithmetic number, because the mean of its divisors is an integer number (2463300).

Almost surely, 2^51488416 is an apocalyptic number.

51488416 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 51488416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59119200).

51488416 is an abundant number, since it is smaller than the sum of its proper divisors (66749984).

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

51488416 is an equidigital number, since it uses as much as digits as its factorization.

51488416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4722 (or 4700 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 51488416 is about 7175.5429062894. The cubic root of 51488416 is about 372.0230455527.

Subtracting 51488416 from its reverse (61488415), we obtain a palindrome (9999999).

The spelling of 51488416 in words is "fifty-one million, four hundred eighty-eight thousand, four hundred sixteen".