253243465 has 4 divisors (see below), whose sum is σ = 303892164. Its totient is φ = 202594768.

The previous prime is 253243453. The next prime is 253243481. The reversal of 253243465 is 564342352.

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 48066489 + 205176976 = 6933^2 + 14324^2 .

It is a cyclic number.

It is not a de Polignac number, because 253243465 - 2⁷ = 253243337 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 253243465.

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, 25324342 + ... + 25324351.

It is an arithmetic number, because the mean of its divisors is an integer number (75973041).

Almost surely, 2^253243465 is an apocalyptic number.

It is an amenable number.

253243465 is a deficient number, since it is larger than the sum of its proper divisors (50648699).

253243465 is an equidigital number, since it uses as much as digits as its factorization.

253243465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50648698.

The product of its digits is 86400, while the sum is 34.

The square root of 253243465 is about 15913.6251369699. The cubic root of 253243465 is about 632.6731672897.

The spelling of 253243465 in words is "two hundred fifty-three million, two hundred forty-three thousand, four hundred sixty-five".