53305021 has 8 divisors (see below), whose sum is σ = 66458304. Its totient is φ = 41536320.

The previous prime is 53305019. The next prime is 53305039. The reversal of 53305021 is 12050335.

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

It is not a de Polignac number, because 53305021 - 2¹ = 53305019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53305021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53305001) 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 7 ways as a sum of consecutive naturals, for example, 346060 + ... + 346213.

It is an arithmetic number, because the mean of its divisors is an integer number (8307288).

Almost surely, 2^53305021 is an apocalyptic number.

It is an amenable number.

53305021 is a deficient number, since it is larger than the sum of its proper divisors (13153283).

53305021 is a wasteful number, since it uses less digits than its factorization.

53305021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692291.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 53305021 is about 7301.0287631265. The cubic root of 53305021 is about 376.3477924483.

Adding to 53305021 its reverse (12050335), we get a palindrome (65355356).

The spelling of 53305021 in words is "fifty-three million, three hundred five thousand, twenty-one".