53217120 has 96 divisors (see below), whose sum is σ = 182891520. Its totient is φ = 12899840.

The previous prime is 53217097. The next prime is 53217121. The reversal of 53217120 is 2171235.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×53217120² = 5664123722188800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53217121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241 + ... + 10319.

It is an arithmetic number, because the mean of its divisors is an integer number (1905120).

Almost surely, 2^53217120 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 53217120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91445760).

53217120 is an abundant number, since it is smaller than the sum of its proper divisors (129674400).

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

53217120 is a wasteful number, since it uses less digits than its factorization.

53217120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10108 (or 10100 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 53217120 is about 7295.0065113062. The cubic root of 53217120 is about 376.1408103962.

Adding to 53217120 its reverse (2171235), we get a palindrome (55388355).

The spelling of 53217120 in words is "fifty-three million, two hundred seventeen thousand, one hundred twenty".