253522645 has 8 divisors (see below), whose sum is σ = 305267256. Its totient is φ = 202124736.

The previous prime is 253522627. The next prime is 253522651. The reversal of 253522645 is 546225352.

It can be written as a sum of positive squares in 4 ways, for example, as 112720689 + 140801956 = 10617^2 + 11866^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 253522645 - 2⁹ = 253522133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253522645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85062 + ... + 87991.

It is an arithmetic number, because the mean of its divisors is an integer number (38158407).

Almost surely, 2^253522645 is an apocalyptic number.

It is an amenable number.

253522645 is a deficient number, since it is larger than the sum of its proper divisors (51744611).

253522645 is a wasteful number, since it uses less digits than its factorization.

253522645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173351.

The product of its digits is 72000, while the sum is 34.

The square root of 253522645 is about 15922.3944493283. The cubic root of 253522645 is about 632.9055718758.

Adding to 253522645 its reverse (546225352), we get a palindrome (799747997).

The spelling of 253522645 in words is "two hundred fifty-three million, five hundred twenty-two thousand, six hundred forty-five".