53055553 has 4 divisors (see below), whose sum is σ = 53072640. Its totient is φ = 53038468.

The previous prime is 53055551. The next prime is 53055557. The reversal of 53055553 is 35555035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35555035 = 5 ⋅7111007.

It is a cyclic number.

It is not a de Polignac number, because 53055553 - 2¹ = 53055551 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53055551) 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, 2425 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (13268160).

Almost surely, 2^53055553 is an apocalyptic number.

It is an amenable number.

53055553 is a deficient number, since it is larger than the sum of its proper divisors (17087).

53055553 is a wasteful number, since it uses less digits than its factorization.

53055553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17086.

The product of its (nonzero) digits is 28125, while the sum is 31.

The square root of 53055553 is about 7283.9242857130. The cubic root of 53055553 is about 375.7597704389.

The spelling of 53055553 in words is "fifty-three million, fifty-five thousand, five hundred fifty-three".