52385721 has 16 divisors (see below), whose sum is σ = 74530368. Its totient is φ = 32614400.

The previous prime is 52385701. The next prime is 52385737. The reversal of 52385721 is 12758325.

It is a cyclic number.

It is not a de Polignac number, because 52385721 - 2⁵ = 52385689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52385701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2761 + ... + 10601.

It is an arithmetic number, because the mean of its divisors is an integer number (4658148).

Almost surely, 2^52385721 is an apocalyptic number.

52385721 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52385721 is a deficient number, since it is larger than the sum of its proper divisors (22144647).

52385721 is a wasteful number, since it uses less digits than its factorization.

52385721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7992.

The product of its digits is 16800, while the sum is 33.

The square root of 52385721 is about 7237.7980767634. The cubic root of 52385721 is about 374.1717328318.

The spelling of 52385721 in words is "fifty-two million, three hundred eighty-five thousand, seven hundred twenty-one".