53065553 has 4 divisors (see below), whose sum is σ = 53483520. Its totient is φ = 52647588.

The previous prime is 53065513. The next prime is 53065559. The reversal of 53065553 is 35556035.

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: 35556035 = 5 ⋅7111207.

It is a cyclic number.

It is not a de Polignac number, because 53065553 - 2⁶ = 53065489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53065559) 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, 208793 + ... + 209046.

It is an arithmetic number, because the mean of its divisors is an integer number (13370880).

Almost surely, 2^53065553 is an apocalyptic number.

It is an amenable number.

53065553 is a deficient number, since it is larger than the sum of its proper divisors (417967).

53065553 is a wasteful number, since it uses less digits than its factorization.

53065553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417966.

The product of its (nonzero) digits is 33750, while the sum is 32.

The square root of 53065553 is about 7284.6106965300. The cubic root of 53065553 is about 375.7833769007.

The spelling of 53065553 in words is "fifty-three million, sixty-five thousand, five hundred fifty-three".