53921472 has 112 divisors (see below), whose sum is σ = 157666944. Its totient is φ = 16262400.

The previous prime is 53921471. The next prime is 53921479. The reversal of 53921472 is 27412935.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53921471) 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, 255447 + ... + 255657.

Almost surely, 2^53921472 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 53921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78833472).

53921472 is an abundant number, since it is smaller than the sum of its proper divisors (103745472).

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

53921472 is a wasteful number, since it uses less digits than its factorization.

53921472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 227 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 53921472 is about 7343.1241307770. The cubic root of 53921472 is about 377.7930055633.

The spelling of 53921472 in words is "fifty-three million, nine hundred twenty-one thousand, four hundred seventy-two".