53143239 has 4 divisors (see below), whose sum is σ = 70857656. Its totient is φ = 35428824.

The previous prime is 53143219. The next prime is 53143243. The reversal of 53143239 is 93234135.

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

It is not a de Polignac number, because 53143239 - 2⁸ = 53142983 is a prime.

It is a super-2 number, since 2×53143239² = 5648407702822242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53143219) 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, 8857204 + ... + 8857209.

It is an arithmetic number, because the mean of its divisors is an integer number (17714414).

Almost surely, 2^53143239 is an apocalyptic number.

53143239 is a deficient number, since it is larger than the sum of its proper divisors (17714417).

53143239 is a wasteful number, since it uses less digits than its factorization.

53143239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17714416.

The product of its digits is 9720, while the sum is 30.

The square root of 53143239 is about 7289.9409462629. The cubic root of 53143239 is about 375.9666651261.

The spelling of 53143239 in words is "fifty-three million, one hundred forty-three thousand, two hundred thirty-nine".