253307643 has 16 divisors (see below), whose sum is σ = 341957280. Its totient is φ = 166772736.

The previous prime is 253307611. The next prime is 253307647. The reversal of 253307643 is 346703352.

It is not a de Polignac number, because 253307643 - 2⁵ = 253307611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253307647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269871 + ... + 270807.

It is an arithmetic number, because the mean of its divisors is an integer number (21372330).

Almost surely, 2^253307643 is an apocalyptic number.

253307643 is a deficient number, since it is larger than the sum of its proper divisors (88649637).

253307643 is an equidigital number, since it uses as much as digits as its factorization.

253307643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966.

The product of its (nonzero) digits is 45360, while the sum is 33.

The square root of 253307643 is about 15915.6414573840. The cubic root of 253307643 is about 632.7266076540.

The spelling of 253307643 in words is "two hundred fifty-three million, three hundred seven thousand, six hundred forty-three".