253448645 has 4 divisors (see below), whose sum is σ = 304138380. Its totient is φ = 202758912.

The previous prime is 253448641. The next prime is 253448659. The reversal of 253448645 is 546844352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 225210049 = 5314^2 + 15007^2 .

It is a cyclic number.

It is not a de Polignac number, because 253448645 - 2² = 253448641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253448641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25344860 + ... + 25344869.

It is an arithmetic number, because the mean of its divisors is an integer number (76034595).

Almost surely, 2^253448645 is an apocalyptic number.

It is an amenable number.

253448645 is a deficient number, since it is larger than the sum of its proper divisors (50689735).

253448645 is an equidigital number, since it uses as much as digits as its factorization.

253448645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50689734.

The product of its digits is 460800, while the sum is 41.

The square root of 253448645 is about 15920.0705086378. The cubic root of 253448645 is about 632.8439868842.

The spelling of 253448645 in words is "two hundred fifty-three million, four hundred forty-eight thousand, six hundred forty-five".