53215232 has 76 divisors (see below), whose sum is σ = 125828880. Its totient is φ = 22020096.

The previous prime is 53215229. The next prime is 53215247. The reversal of 53215232 is 23251235.

Its product of digits (1800) is a multiple of the sum of its prime factors (72).

It is a junction number, because it is equal to n+sod(n) for n = 53215198 and 53215207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1834994 + ... + 1835022.

Almost surely, 2^53215232 is an apocalyptic number.

53215232 is a droll number since its even prime factors and its odd prime factors have the same sum.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53215232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62914440).

53215232 is an abundant number, since it is smaller than the sum of its proper divisors (72613648).

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

53215232 is an frugal number, since it uses more digits than its factorization.

53215232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72 (or 38 counting only the distinct ones).

The product of its digits is 1800, while the sum is 23.

The square root of 53215232 is about 7294.8771065728. The cubic root of 53215232 is about 376.1363621895.

Adding to 53215232 its reverse (23251235), we get a palindrome (76466467).

The spelling of 53215232 in words is "fifty-three million, two hundred fifteen thousand, two hundred thirty-two".