253304605 has 4 divisors (see below), whose sum is σ = 303965532. Its totient is φ = 202643680.

The previous prime is 253304603. The next prime is 253304609. The reversal of 253304605 is 506403352.

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 168922009 + 84382596 = 12997^2 + 9186^2 .

It is not a de Polignac number, because 253304605 - 2¹ = 253304603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253304603) 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, 25330456 + ... + 25330465.

It is an arithmetic number, because the mean of its divisors is an integer number (75991383).

Almost surely, 2^253304605 is an apocalyptic number.

It is an amenable number.

253304605 is a deficient number, since it is larger than the sum of its proper divisors (50660927).

253304605 is an equidigital number, since it uses as much as digits as its factorization.

253304605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50660926.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 253304605 is about 15915.5460163954. The cubic root of 253304605 is about 632.7240781460.

Adding to 253304605 its reverse (506403352), we get a palindrome (759707957).

The spelling of 253304605 in words is "two hundred fifty-three million, three hundred four thousand, six hundred five".