50661520 has 80 divisors (see below), whose sum is σ = 144990720. Its totient is φ = 16031232.

The previous prime is 50661511. The next prime is 50661529. The reversal of 50661520 is 2516605.

It is an interprime number because it is at equal distance from previous prime (50661511) and next prime (50661529).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (50661529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3801 + ... + 10759.

It is an arithmetic number, because the mean of its divisors is an integer number (1812384).

Almost surely, 2^50661520 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 50661520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72495360).

50661520 is an abundant number, since it is smaller than the sum of its proper divisors (94329200).

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

50661520 is a wasteful number, since it uses less digits than its factorization.

50661520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6992 (or 6986 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 50661520 is about 7117.6906367164. The cubic root of 50661520 is about 370.0207439064.

It can be divided in two parts, 506 and 61520, that added together give a palindrome (62026).

The spelling of 50661520 in words is "fifty million, six hundred sixty-one thousand, five hundred twenty".