52540143 has 4 divisors (see below), whose sum is σ = 70053528. Its totient is φ = 35026760.

The previous prime is 52540121. The next prime is 52540151. The reversal of 52540143 is 34104525.

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 52540143 - 2⁹ = 52539631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52540153) 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, 8756688 + ... + 8756693.

It is an arithmetic number, because the mean of its divisors is an integer number (17513382).

Almost surely, 2^52540143 is an apocalyptic number.

52540143 is a deficient number, since it is larger than the sum of its proper divisors (17513385).

52540143 is a wasteful number, since it uses less digits than its factorization.

52540143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17513384.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 52540143 is about 7248.4579739418. The cubic root of 52540143 is about 374.5390318099.

Adding to 52540143 its reverse (34104525), we get a palindrome (86644668).

The spelling of 52540143 in words is "fifty-two million, five hundred forty thousand, one hundred forty-three".