311009245 has 8 divisors (see below), whose sum is σ = 374486616. Its totient is φ = 247957056.

The previous prime is 311009191. The next prime is 311009249. The reversal of 311009245 is 542900113.

It can be written as a sum of positive squares in 4 ways, for example, as 121286169 + 189723076 = 11013^2 + 13774^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311009245 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311009249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 104682 + ... + 107611.

It is an arithmetic number, because the mean of its divisors is an integer number (46810827).

Almost surely, 2^311009245 is an apocalyptic number.

It is an amenable number.

311009245 is a deficient number, since it is larger than the sum of its proper divisors (63477371).

311009245 is a wasteful number, since it uses less digits than its factorization.

311009245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212591.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 311009245 is about 17635.4542045279. The cubic root of 311009245 is about 677.5236086053.

Adding to 311009245 its reverse (542900113), we get a palindrome (853909358).

The spelling of 311009245 in words is "three hundred eleven million, nine thousand, two hundred forty-five".