51501516 has 48 divisors (see below), whose sum is σ = 132427008. Its totient is φ = 15448000.

The previous prime is 51501503. The next prime is 51501539. The reversal of 51501516 is 61510515.

51501516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 11401 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (2758896).

Almost surely, 2^51501516 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 51501516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66213504).

51501516 is an abundant number, since it is smaller than the sum of its proper divisors (80925492).

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

51501516 is a wasteful number, since it uses less digits than its factorization.

51501516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3982 (or 3980 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 51501516 is about 7176.4556711513. The cubic root of 51501516 is about 372.0545936756.

It can be divided in two parts, 5150 and 1516, that added together give a palindrome (6666).

The spelling of 51501516 in words is "fifty-one million, five hundred one thousand, five hundred sixteen".