53531328 has 28 divisors (see below), whose sum is σ = 141635480. Its totient is φ = 17843712.

The previous prime is 53531323. The next prime is 53531329. The reversal of 53531328 is 82313535.

It is a junction number, because it is equal to n+sod(n) for n = 53531295 and 53531304.

It is not an unprimeable number, because it can be changed into a prime (53531323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139213 + ... + 139596.

It is an arithmetic number, because the mean of its divisors is an integer number (5058410).

Almost surely, 2^53531328 is an apocalyptic number.

It is an amenable number.

53531328 is an abundant number, since it is smaller than the sum of its proper divisors (88104152).

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

53531328 is a wasteful number, since it uses less digits than its factorization.

53531328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278824 (or 278814 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 53531328 is about 7316.5106437427. The cubic root of 53531328 is about 376.8796366131.

The spelling of 53531328 in words is "fifty-three million, five hundred thirty-one thousand, three hundred twenty-eight".