311117253 has 4 divisors (see below), whose sum is σ = 414823008. Its totient is φ = 207411500.

The previous prime is 311117239. The next prime is 311117281. The reversal of 311117253 is 352711113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352711113 = 3 ⋅117570371.

It is a cyclic number.

It is not a de Polignac number, because 311117253 - 2⁶ = 311117189 is a prime.

It is a super-2 number, since 2×311117253² = 193587890228532018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311117203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51852873 + ... + 51852878.

It is an arithmetic number, because the mean of its divisors is an integer number (103705752).

Almost surely, 2^311117253 is an apocalyptic number.

It is an amenable number.

311117253 is a deficient number, since it is larger than the sum of its proper divisors (103705755).

311117253 is a wasteful number, since it uses less digits than its factorization.

311117253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103705754.

The product of its digits is 630, while the sum is 24.

The square root of 311117253 is about 17638.5161790894. The cubic root of 311117253 is about 677.6020301759.

Adding to 311117253 its reverse (352711113), we get a palindrome (663828366).

The spelling of 311117253 in words is "three hundred eleven million, one hundred seventeen thousand, two hundred fifty-three".