57520224 has 144 divisors (see below), whose sum is σ = 173365920. Its totient is φ = 18063360.

The previous prime is 57520219. The next prime is 57520249. The reversal of 57520224 is 42202575.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592944 + ... + 593040.

It is an arithmetic number, because the mean of its divisors is an integer number (1203930).

Almost surely, 2^57520224 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 57520224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86682960).

57520224 is an abundant number, since it is smaller than the sum of its proper divisors (115845696).

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

57520224 is a wasteful number, since it uses less digits than its factorization.

57520224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 57520224 is about 7584.2088578836. The cubic root of 57520224 is about 386.0173777602.

Adding to 57520224 its reverse (42202575), we get a palindrome (99722799).

The spelling of 57520224 in words is "fifty-seven million, five hundred twenty thousand, two hundred twenty-four".