253247465 has 4 divisors (see below), whose sum is σ = 303896964. Its totient is φ = 202597968.

The previous prime is 253247443. The next prime is 253247509. The reversal of 253247465 is 564742352.

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 99760144 + 153487321 = 9988^2 + 12389^2 .

It is a cyclic number.

It is not a de Polignac number, because 253247465 - 2¹² = 253243369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25324742 + ... + 25324751.

It is an arithmetic number, because the mean of its divisors is an integer number (75974241).

Almost surely, 2^253247465 is an apocalyptic number.

It is an amenable number.

253247465 is a deficient number, since it is larger than the sum of its proper divisors (50649499).

253247465 is an equidigital number, since it uses as much as digits as its factorization.

253247465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50649498.

The product of its digits is 201600, while the sum is 38.

The square root of 253247465 is about 15913.7508149399. The cubic root of 253247465 is about 632.6764983126.

The spelling of 253247465 in words is "two hundred fifty-three million, two hundred forty-seven thousand, four hundred sixty-five".