231311334 has 16 divisors (see below), whose sum is σ = 462834288. Its totient is φ = 77068512.

The previous prime is 231311287. The next prime is 231311357. The reversal of 231311334 is 433113132.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 231311334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7804 + ... + 22880.

It is an arithmetic number, because the mean of its divisors is an integer number (28927143).

Almost surely, 2^231311334 is an apocalyptic number.

231311334 is an abundant number, since it is smaller than the sum of its proper divisors (231522954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231311334 is a wasteful number, since it uses less digits than its factorization.

231311334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17639.

The product of its digits is 648, while the sum is 21.

The square root of 231311334 is about 15208.9228415427. The cubic root of 231311334 is about 613.8547740155.

Adding to 231311334 its reverse (433113132), we get a palindrome (664424466).

The spelling of 231311334 in words is "two hundred thirty-one million, three hundred eleven thousand, three hundred thirty-four".