53001216 has 154 divisors (see below), whose sum is σ = 161090712. Its totient is φ = 17418240.

The previous prime is 53001211. The next prime is 53001239. The reversal of 53001216 is 61210035.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53001211) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 746461 + ... + 746531.

Almost surely, 2^53001216 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 53001216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80545356).

53001216 is an abundant number, since it is smaller than the sum of its proper divisors (108089496).

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

53001216 is an frugal number, since it uses more digits than its factorization.

53001216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 53001216 is about 7280.1934040244. The cubic root of 53001216 is about 375.6314481319.

The spelling of 53001216 in words is "fifty-three million, one thousand, two hundred sixteen".