53721144 has 40 divisors (see below), whose sum is σ = 150470760. Its totient is φ = 17906832.

The previous prime is 53721121. The next prime is 53721149. The reversal of 53721144 is 44112735.

53721144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×53721144² = 5771922625337472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 (53721149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40804 + ... + 42099.

It is an arithmetic number, because the mean of its divisors is an integer number (3761769).

Almost surely, 2^53721144 is an apocalyptic number.

53721144 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

53721144 is an abundant number, since it is smaller than the sum of its proper divisors (96749616).

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

53721144 is a wasteful number, since it uses less digits than its factorization.

53721144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82921 (or 82908 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 53721144 is about 7329.4709222426. The cubic root of 53721144 is about 377.3245685748.

Adding to 53721144 its reverse (44112735), we get a palindrome (97833879).

The spelling of 53721144 in words is "fifty-three million, seven hundred twenty-one thousand, one hundred forty-four".