53143549 has 4 divisors (see below), whose sum is σ = 53158336. Its totient is φ = 53128764.

The previous prime is 53143543. The next prime is 53143553. The reversal of 53143549 is 94534135.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94534135 = 5 ⋅18906827.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53143549 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 (53143543) 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, 1852 + ... + 10474.

It is an arithmetic number, because the mean of its divisors is an integer number (13289584).

Almost surely, 2^53143549 is an apocalyptic number.

It is an amenable number.

53143549 is a deficient number, since it is larger than the sum of its proper divisors (14787).

53143549 is an equidigital number, since it uses as much as digits as its factorization.

53143549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14786.

The product of its digits is 32400, while the sum is 34.

The square root of 53143549 is about 7289.9622084068. The cubic root of 53143549 is about 375.9673961657.

The spelling of 53143549 in words is "fifty-three million, one hundred forty-three thousand, five hundred forty-nine".