53721822 has 96 divisors (see below), whose sum is σ = 139560192. Its totient is φ = 13503600.

The previous prime is 53721809. The next prime is 53721847. The reversal of 53721822 is 22812735.

It is a self number, because there is not a number n which added to its sum of digits gives 53721822.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1732947 + ... + 1732977.

It is an arithmetic number, because the mean of its divisors is an integer number (1453752).

Almost surely, 2^53721822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53721822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69780096).

53721822 is an abundant number, since it is smaller than the sum of its proper divisors (85838370).

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

53721822 is a wasteful number, since it uses less digits than its factorization.

53721822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 54 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 53721822 is about 7329.5171737298. The cubic root of 53721822 is about 377.3261559385.

The spelling of 53721822 in words is "fifty-three million, seven hundred twenty-one thousand, eight hundred twenty-two".