53056921 has 4 divisors (see below), whose sum is σ = 54886500. Its totient is φ = 51227344.

The previous prime is 53056919. The next prime is 53056931. The reversal of 53056921 is 12965035.

53056921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 31304025 = 4664^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 53056921 - 2¹ = 53056919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53056901) 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 3 ways as a sum of consecutive naturals, for example, 914746 + ... + 914803.

It is an arithmetic number, because the mean of its divisors is an integer number (13721625).

Almost surely, 2^53056921 is an apocalyptic number.

It is an amenable number.

53056921 is a deficient number, since it is larger than the sum of its proper divisors (1829579).

53056921 is a wasteful number, since it uses less digits than its factorization.

53056921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829578.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 53056921 is about 7284.0181905319. The cubic root of 53056921 is about 375.7629999780.

The spelling of 53056921 in words is "fifty-three million, fifty-six thousand, nine hundred twenty-one".