253644305 has 16 divisors (see below), whose sum is σ = 309391488. Its totient is φ = 199584000.

The previous prime is 253644269. The next prime is 253644311. The reversal of 253644305 is 503446352.

253644305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 253644305 - 2⁶ = 253644241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287465 + ... + 288345.

It is an arithmetic number, because the mean of its divisors is an integer number (19336968).

Almost surely, 2^253644305 is an apocalyptic number.

It is an amenable number.

253644305 is a deficient number, since it is larger than the sum of its proper divisors (55747183).

253644305 is an equidigital number, since it uses as much as digits as its factorization.

253644305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 253644305 is about 15926.2143963969. The cubic root of 253644305 is about 633.0067948894.

The spelling of 253644305 in words is "two hundred fifty-three million, six hundred forty-four thousand, three hundred five".