253845305 has 16 divisors (see below), whose sum is σ = 348399360. Its totient is φ = 173931072.

The previous prime is 253845289. The next prime is 253845307. The reversal of 253845305 is 503548352.

It is not a de Polignac number, because 253845305 - 2⁴ = 253845289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (253845307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69587 + ... + 73143.

It is an arithmetic number, because the mean of its divisors is an integer number (21774960).

Almost surely, 2^253845305 is an apocalyptic number.

It is an amenable number.

253845305 is a deficient number, since it is larger than the sum of its proper divisors (94554055).

253845305 is a wasteful number, since it uses less digits than its factorization.

253845305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5608.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 253845305 is about 15932.5234975505. The cubic root of 253845305 is about 633.1739591284.

The spelling of 253845305 in words is "two hundred fifty-three million, eight hundred forty-five thousand, three hundred five".