253143644 has 24 divisors (see below), whose sum is σ = 492471168. Its totient is φ = 113065920.

The previous prime is 253143641. The next prime is 253143731. The reversal of 253143644 is 446341352.

253143644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 253143644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253143641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76907 + ... + 80130.

It is an arithmetic number, because the mean of its divisors is an integer number (20519632).

Almost surely, 2^253143644 is an apocalyptic number.

It is an amenable number.

253143644 is a deficient number, since it is larger than the sum of its proper divisors (239327524).

253143644 is a wasteful number, since it uses less digits than its factorization.

253143644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157085 (or 157083 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 253143644 is about 15910.4884903010. The cubic root of 253143644 is about 632.5900294183.

Adding to 253143644 its reverse (446341352), we get a palindrome (699484996).

The spelling of 253143644 in words is "two hundred fifty-three million, one hundred forty-three thousand, six hundred forty-four".