50721696 has 72 divisors (see below), whose sum is σ = 149238180. Its totient is φ = 16321536.

The previous prime is 50721679. The next prime is 50721701. The reversal of 50721696 is 69612705.

It can be written as a sum of positive squares in 2 ways, for example, as 47610000 + 3111696 = 6900^2 + 1764^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 50721696.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5316 + ... + 11388.

Almost surely, 2^50721696 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 50721696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74619090).

50721696 is an abundant number, since it is smaller than the sum of its proper divisors (98516484).

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

50721696 is a wasteful number, since it uses less digits than its factorization.

50721696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118 (or 6107 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 50721696 is about 7121.9165959733. The cubic root of 50721696 is about 370.1671900853.

The spelling of 50721696 in words is "fifty million, seven hundred twenty-one thousand, six hundred ninety-six".