253232305 has 4 divisors (see below), whose sum is σ = 303878772. Its totient is φ = 202585840.

The previous prime is 253232297. The next prime is 253232377. The reversal of 253232305 is 503232352.

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 152992161 + 100240144 = 12369^2 + 10012^2 .

It is not a de Polignac number, because 253232305 - 2³ = 253232297 is a prime.

It is a super-2 number, since 2×253232305² = 128253200591226050, which contains 22 as substring.

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 253232305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25323226 + ... + 25323235.

It is an arithmetic number, because the mean of its divisors is an integer number (75969693).

Almost surely, 2^253232305 is an apocalyptic number.

It is an amenable number.

253232305 is a deficient number, since it is larger than the sum of its proper divisors (50646467).

253232305 is an equidigital number, since it uses as much as digits as its factorization.

253232305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50646466.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 253232305 is about 15913.2744901859. The cubic root of 253232305 is about 632.6638735504.

Adding to 253232305 its reverse (503232352), we get a palindrome (756464657).

The spelling of 253232305 in words is "two hundred fifty-three million, two hundred thirty-two thousand, three hundred five".