231022113 has 12 divisors (see below), whose sum is σ = 358320240. Its totient is φ = 132012552.

The previous prime is 231022109. The next prime is 231022123. The reversal of 231022113 is 311220132.

It is not a de Polignac number, because 231022113 - 2² = 231022109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231022092 and 231022101.

It is not an unprimeable number, because it can be changed into a prime (231022123) 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 11 ways as a sum of consecutive naturals, for example, 785643 + ... + 785936.

It is an arithmetic number, because the mean of its divisors is an integer number (29860020).

Almost surely, 2^231022113 is an apocalyptic number.

It is an amenable number.

231022113 is a deficient number, since it is larger than the sum of its proper divisors (127298127).

231022113 is a wasteful number, since it uses less digits than its factorization.

231022113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571596 (or 1571589 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 231022113 is about 15199.4116004535. The cubic root of 231022113 is about 613.5988220974.

Adding to 231022113 its reverse (311220132), we get a palindrome (542242245).

The spelling of 231022113 in words is "two hundred thirty-one million, twenty-two thousand, one hundred thirteen".