53226720 has 216 divisors, whose sum is σ = 193591944. Its totient is φ = 13810176.

The previous prime is 53226707. The next prime is 53226731. The reversal of 53226720 is 2762235.

It is a tau number, because it is divible by the number of its divisors (216).

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

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 35 ways as a sum of consecutive naturals, for example, 1438542 + ... + 1438578.

It is an arithmetic number, because the mean of its divisors is an integer number (896259).

Almost surely, 2^53226720 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 53226720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96795972).

53226720 is an abundant number, since it is smaller than the sum of its proper divisors (140365224).

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

53226720 is an equidigital number, since it uses as much as digits as its factorization.

53226720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 53226720 is about 7295.6644659688. The cubic root of 53226720 is about 376.1634267690.

Adding to 53226720 its reverse (2762235), we get a palindrome (55988955).

The spelling of 53226720 in words is "fifty-three million, two hundred twenty-six thousand, seven hundred twenty".