51722944 has 112 divisors (see below), whose sum is σ = 129040128. Its totient is φ = 20026368.

The previous prime is 51722939. The next prime is 51722953. The reversal of 51722944 is 44922715.

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

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, 483339 + ... + 483445.

It is an arithmetic number, because the mean of its divisors is an integer number (1152144).

Almost surely, 2^51722944 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 51722944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64520064).

51722944 is an abundant number, since it is smaller than the sum of its proper divisors (77317184).

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

51722944 is a wasteful number, since it uses less digits than its factorization.

51722944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 212 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 51722944 is about 7191.8665171150. The cubic root of 51722944 is about 372.5870409033.

The spelling of 51722944 in words is "fifty-one million, seven hundred twenty-two thousand, nine hundred forty-four".