53815143 has 4 divisors (see below), whose sum is σ = 71753528. Its totient is φ = 35876760.

The previous prime is 53815133. The next prime is 53815159. The reversal of 53815143 is 34151835.

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

It is not a de Polignac number, because 53815143 - 2⁴ = 53815127 is a prime.

It is a super-2 number, since 2×53815143² = 5792139232220898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53815143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53815133) 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, 8969188 + ... + 8969193.

It is an arithmetic number, because the mean of its divisors is an integer number (17938382).

Almost surely, 2^53815143 is an apocalyptic number.

53815143 is a deficient number, since it is larger than the sum of its proper divisors (17938385).

53815143 is a wasteful number, since it uses less digits than its factorization.

53815143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938384.

The product of its digits is 7200, while the sum is 30.

The square root of 53815143 is about 7335.8805197468. The cubic root of 53815143 is about 377.5445158971.

Adding to 53815143 its reverse (34151835), we get a palindrome (87966978).

The spelling of 53815143 in words is "fifty-three million, eight hundred fifteen thousand, one hundred forty-three".