50721216 has 112 divisors (see below), whose sum is σ = 165225984. Its totient is φ = 13372416.

The previous prime is 50721197. The next prime is 50721221. The reversal of 50721216 is 61212705.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (24).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16021 + ... + 18923.

It is an arithmetic number, because the mean of its divisors is an integer number (1475232).

Almost surely, 2^50721216 is an apocalyptic number.

50721216 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 50721216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82612992).

50721216 is an abundant number, since it is smaller than the sum of its proper divisors (114504768).

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

50721216 is a wasteful number, since it uses less digits than its factorization.

50721216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2938 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 50721216 is about 7121.8828970996. The cubic root of 50721216 is about 370.1660224008.

The spelling of 50721216 in words is "fifty million, seven hundred twenty-one thousand, two hundred sixteen".