52721280 has 224 divisors, whose sum is σ = 190641060. Its totient is φ = 13934592.

The previous prime is 52721113. The next prime is 52721287. The reversal of 52721280 is 8212725.

It can be written as a sum of positive squares in 2 ways, for example, as 44836416 + 7884864 = 6696^2 + 2808^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52721287) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 466504 + ... + 466616.

Almost surely, 2^52721280 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 52721280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95320530).

52721280 is an abundant number, since it is smaller than the sum of its proper divisors (137919780).

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

52721280 is an equidigital number, since it uses as much as digits as its factorization.

52721280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 52721280 is about 7260.9420876357. The cubic root of 52721280 is about 374.9689574304.

The spelling of 52721280 in words is "fifty-two million, seven hundred twenty-one thousand, two hundred eighty".