231311356 has 12 divisors (see below), whose sum is σ = 409343760. Its totient is φ = 114356000.

The previous prime is 231311287. The next prime is 231311357. The reversal of 231311356 is 653113132.

It is a self number, because there is not a number n which added to its sum of digits gives 231311356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311357) 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, 324520 + ... + 325231.

It is an arithmetic number, because the mean of its divisors is an integer number (34111980).

Almost surely, 2^231311356 is an apocalyptic number.

It is an amenable number.

231311356 is a deficient number, since it is larger than the sum of its proper divisors (178032404).

231311356 is a wasteful number, since it uses less digits than its factorization.

231311356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649844 (or 649842 counting only the distinct ones).

The product of its digits is 1620, while the sum is 25.

The square root of 231311356 is about 15208.9235648023. The cubic root of 231311356 is about 613.8547934767.

Adding to 231311356 its reverse (653113132), we get a palindrome (884424488).

The spelling of 231311356 in words is "two hundred thirty-one million, three hundred eleven thousand, three hundred fifty-six".