53143869 has 12 divisors (see below), whose sum is σ = 74075456. Its totient is φ = 33887832.

The previous prime is 53143843. The next prime is 53143873. The reversal of 53143869 is 96834135.

It is not a de Polignac number, because 53143869 - 2¹¹ = 53141821 is a prime.

It is a super-2 number, since 2×53143869² = 5648541624578322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53143169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15157 + ... + 18330.

Almost surely, 2^53143869 is an apocalyptic number.

It is an amenable number.

53143869 is a deficient number, since it is larger than the sum of its proper divisors (20931587).

53143869 is a wasteful number, since it uses less digits than its factorization.

53143869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33536 (or 33513 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 53143869 is about 7289.9841563614. The cubic root of 53143869 is about 375.9681507842.

The spelling of 53143869 in words is "fifty-three million, one hundred forty-three thousand, eight hundred sixty-nine".