53555143 has 4 divisors (see below), whose sum is σ = 54861408. Its totient is φ = 52248880.

The previous prime is 53555123. The next prime is 53555233. The reversal of 53555143 is 34155535.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34155535 = 5 ⋅6831107.

It is a cyclic number.

It is not a de Polignac number, because 53555143 - 2⁵ = 53555111 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 (53555113) 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, 653071 + ... + 653152.

It is an arithmetic number, because the mean of its divisors is an integer number (13715352).

Almost surely, 2^53555143 is an apocalyptic number.

53555143 is a deficient number, since it is larger than the sum of its proper divisors (1306265).

53555143 is a wasteful number, since it uses less digits than its factorization.

53555143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306264.

The product of its digits is 22500, while the sum is 31.

The square root of 53555143 is about 7318.1379462265. The cubic root of 53555143 is about 376.9355170245.

The spelling of 53555143 in words is "fifty-three million, five hundred fifty-five thousand, one hundred forty-three".