50721336 has 128 divisors (see below), whose sum is σ = 157248000. Its totient is φ = 15054336.

The previous prime is 50721331. The next prime is 50721347. The reversal of 50721336 is 63312705.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50721331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69405 + ... + 70131.

It is an arithmetic number, because the mean of its divisors is an integer number (1228500).

Almost surely, 2^50721336 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 50721336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624000).

50721336 is an abundant number, since it is smaller than the sum of its proper divisors (106526664).

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

50721336 is a wasteful number, since it uses less digits than its factorization.

50721336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 50721336 is about 7121.8913218330. The cubic root of 50721336 is about 370.1663143226.

Subtracting from 50721336 its product of nonzero digits (3780), we obtain a triangular number (50717556 = T₁₀₀₇₁).

The spelling of 50721336 in words is "fifty million, seven hundred twenty-one thousand, three hundred thirty-six".