53798821 has 4 divisors (see below), whose sum is σ = 53820972. Its totient is φ = 53776672.

The previous prime is 53798813. The next prime is 53798827. The reversal of 53798821 is 12889735.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12889735 = 5 ⋅2577947.

It can be written as a sum of positive squares in 2 ways, for example, as 11730625 + 42068196 = 3425^2 + 6486^2 .

It is a cyclic number.

It is not a de Polignac number, because 53798821 - 2³ = 53798813 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 (53798827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6910 + ... + 12463.

It is an arithmetic number, because the mean of its divisors is an integer number (13455243).

Almost surely, 2^53798821 is an apocalyptic number.

It is an amenable number.

53798821 is a deficient number, since it is larger than the sum of its proper divisors (22151).

53798821 is a wasteful number, since it uses less digits than its factorization.

53798821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22150.

The product of its digits is 120960, while the sum is 43.

The square root of 53798821 is about 7334.7679581565. The cubic root of 53798821 is about 377.5063425977.

The spelling of 53798821 in words is "fifty-three million, seven hundred ninety-eight thousand, eight hundred twenty-one".