52721004 has 48 divisors (see below), whose sum is σ = 144397568. Its totient is φ = 14655168.

The previous prime is 52721003. The next prime is 52721017. The reversal of 52721004 is 40012725.

52721004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (52721003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5374 + ... + 11589.

Almost surely, 2^52721004 is an apocalyptic number.

It is an amenable number.

52721004 is an abundant number, since it is smaller than the sum of its proper divisors (91676564).

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

52721004 is a wasteful number, since it uses less digits than its factorization.

52721004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014 (or 17012 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 52721004 is about 7260.9230818127. The cubic root of 52721004 is about 374.9683030987.

Adding to 52721004 its reverse (40012725), we get a palindrome (92733729).

The spelling of 52721004 in words is "fifty-two million, seven hundred twenty-one thousand, four".