53143647 has 4 divisors (see below), whose sum is σ = 70858200. Its totient is φ = 35429096.

The previous prime is 53143637. The next prime is 53143679. The reversal of 53143647 is 74634135.

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

It is a cyclic number.

It is not a de Polignac number, because 53143647 - 2¹⁵ = 53110879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53143637) 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, 8857272 + ... + 8857277.

It is an arithmetic number, because the mean of its divisors is an integer number (17714550).

Almost surely, 2^53143647 is an apocalyptic number.

53143647 is a deficient number, since it is larger than the sum of its proper divisors (17714553).

53143647 is a wasteful number, since it uses less digits than its factorization.

53143647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17714552.

The product of its digits is 30240, while the sum is 33.

The square root of 53143647 is about 7289.9689299749. The cubic root of 53143647 is about 375.9676272679.

The spelling of 53143647 in words is "fifty-three million, one hundred forty-three thousand, six hundred forty-seven".