52587821 has 32 divisors (see below), whose sum is σ = 65802240. Its totient is φ = 41342400.

The previous prime is 52587809. The next prime is 52587823. The reversal of 52587821 is 12878525.

It is a happy number.

52587821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52587821 - 2⁶ = 52587757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52587823) 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 31 ways as a sum of consecutive naturals, for example, 193916 + ... + 194186.

It is an arithmetic number, because the mean of its divisors is an integer number (2056320).

Almost surely, 2^52587821 is an apocalyptic number.

It is an amenable number.

52587821 is a deficient number, since it is larger than the sum of its proper divisors (13214419).

52587821 is a wasteful number, since it uses less digits than its factorization.

52587821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its digits is 44800, while the sum is 38.

The square root of 52587821 is about 7251.7460656038. The cubic root of 52587821 is about 374.6522904352.

The spelling of 52587821 in words is "fifty-two million, five hundred eighty-seven thousand, eight hundred twenty-one".