52030821 has 8 divisors (see below), whose sum is σ = 69528064. Its totient is φ = 34610400.

The previous prime is 52030801. The next prime is 52030831. The reversal of 52030821 is 12803025.

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

It is not a de Polignac number, because 52030821 - 2²² = 47836517 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 (52030801) 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, 17605 + ... + 20346.

It is an arithmetic number, because the mean of its divisors is an integer number (8691008).

Almost surely, 2^52030821 is an apocalyptic number.

It is an amenable number.

52030821 is a deficient number, since it is larger than the sum of its proper divisors (17497243).

52030821 is a wasteful number, since it uses less digits than its factorization.

52030821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38411.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 52030821 is about 7213.2392862014. The cubic root of 52030821 is about 373.3248445313.

Adding to 52030821 its reverse (12803025), we get a palindrome (64833846).

The spelling of 52030821 in words is "fifty-two million, thirty thousand, eight hundred twenty-one".