253643143 has 6 divisors (see below), whose sum is σ = 274655184. Its totient is φ = 234131976.

The previous prime is 253643129. The next prime is 253643189. The reversal of 253643143 is 341346352.

It is not a de Polignac number, because 253643143 - 2¹⁷ = 253512071 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 (253643113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 750255 + ... + 750592.

It is an arithmetic number, because the mean of its divisors is an integer number (45775864).

Almost surely, 2^253643143 is an apocalyptic number.

253643143 is a deficient number, since it is larger than the sum of its proper divisors (21012041).

253643143 is a wasteful number, since it uses less digits than its factorization.

253643143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500873 (or 1500860 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

The square root of 253643143 is about 15926.1779156206. The cubic root of 253643143 is about 633.0058282404.

Adding to 253643143 its reverse (341346352), we get a palindrome (594989495).

The spelling of 253643143 in words is "two hundred fifty-three million, six hundred forty-three thousand, one hundred forty-three".