53289821 has 8 divisors (see below), whose sum is σ = 57448440. Its totient is φ = 49139712.

The previous prime is 53289793. The next prime is 53289829. The reversal of 53289821 is 12898235.

It can be written as a sum of positive squares in 4 ways, for example, as 4778596 + 48511225 = 2186^2 + 6965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53289821 - 2⁶ = 53289757 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 (53289829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17981 + ... + 20733.

It is an arithmetic number, because the mean of its divisors is an integer number (7181055).

Almost surely, 2^53289821 is an apocalyptic number.

It is an amenable number.

53289821 is a deficient number, since it is larger than the sum of its proper divisors (4158619).

53289821 is a wasteful number, since it uses less digits than its factorization.

53289821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255.

The product of its digits is 34560, while the sum is 38.

The square root of 53289821 is about 7299.9877397157. The cubic root of 53289821 is about 376.3120170175.

The spelling of 53289821 in words is "fifty-three million, two hundred eighty-nine thousand, eight hundred twenty-one".