53921772 has 72 divisors (see below), whose sum is σ = 148162560. Its totient is φ = 16472160.

The previous prime is 53921771. The next prime is 53921789. The reversal of 53921772 is 27712935.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (53921771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19933 + ... + 22475.

Almost surely, 2^53921772 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 53921772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74081280).

53921772 is an abundant number, since it is smaller than the sum of its proper divisors (94240788).

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

53921772 is a wasteful number, since it uses less digits than its factorization.

53921772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603 (or 2598 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 53921772 is about 7343.1445580214. The cubic root of 53921772 is about 377.7937061975.

The spelling of 53921772 in words is "fifty-three million, nine hundred twenty-one thousand, seven hundred seventy-two".