308231113 has 4 divisors (see below), whose sum is σ = 308266948. Its totient is φ = 308195280.

The previous prime is 308231107. The next prime is 308231141. The reversal of 308231113 is 311132803.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14040009 + 294191104 = 3747^2 + 17152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308231113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (308231173) 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 3 ways as a sum of consecutive naturals, for example, 3595 + ... + 25087.

It is an arithmetic number, because the mean of its divisors is an integer number (77066737).

Almost surely, 2^308231113 is an apocalyptic number.

It is an amenable number.

308231113 is a deficient number, since it is larger than the sum of its proper divisors (35835).

308231113 is a wasteful number, since it uses less digits than its factorization.

308231113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35834.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 308231113 is about 17556.5119827373. The cubic root of 308231113 is about 675.5002148621.

Adding to 308231113 its reverse (311132803), we get a palindrome (619363916).

The spelling of 308231113 in words is "three hundred eight million, two hundred thirty-one thousand, one hundred thirteen".