52721436 has 24 divisors (see below), whose sum is σ = 123918480. Its totient is φ = 17444992.

The previous prime is 52721423. The next prime is 52721441. The reversal of 52721436 is 63412725.

52721436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14391 + ... + 17678.

It is an arithmetic number, because the mean of its divisors is an integer number (5163270).

Almost surely, 2^52721436 is an apocalyptic number.

It is an amenable number.

52721436 is an abundant number, since it is smaller than the sum of its proper divisors (71197044).

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

52721436 is a wasteful number, since it uses less digits than its factorization.

52721436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32213 (or 32211 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 52721436 is about 7260.9528300355. The cubic root of 52721436 is about 374.9693272690.

The spelling of 52721436 in words is "fifty-two million, seven hundred twenty-one thousand, four hundred thirty-six".