253240313 has 8 divisors (see below), whose sum is σ = 274677480. Its totient is φ = 232529920.

The previous prime is 253240297. The next prime is 253240343. The reversal of 253240313 is 313042352.

It can be written as a sum of positive squares in 4 ways, for example, as 18292729 + 234947584 = 4277^2 + 15328^2 .

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 253240313 - 2⁴ = 253240297 is a prime.

It is a super-2 number, since 2×253240313² = 128261312256675938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253240343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180968 + ... + 182361.

It is an arithmetic number, because the mean of its divisors is an integer number (34334685).

Almost surely, 2^253240313 is an apocalyptic number.

It is an amenable number.

253240313 is a deficient number, since it is larger than the sum of its proper divisors (21437167).

253240313 is a wasteful number, since it uses less digits than its factorization.

253240313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363387.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 253240313 is about 15913.5261020303. The cubic root of 253240313 is about 632.6705424190.

Adding to 253240313 its reverse (313042352), we get a palindrome (566282665).

The spelling of 253240313 in words is "two hundred fifty-three million, two hundred forty thousand, three hundred thirteen".