231311022 has 8 divisors (see below), whose sum is σ = 462622056. Its totient is φ = 77103672.

The previous prime is 231311021. The next prime is 231311029. The reversal of 231311022 is 220113132.

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

231311022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 231310992 and 231311010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19275913 + ... + 19275924.

It is an arithmetic number, because the mean of its divisors is an integer number (57827757).

Almost surely, 2^231311022 is an apocalyptic number.

231311022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231311022 is a wasteful number, since it uses less digits than its factorization.

231311022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38551842.

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

The square root of 231311022 is about 15208.9125844026. The cubic root of 231311022 is about 613.8544980198.

Adding to 231311022 its reverse (220113132), we get a palindrome (451424154).

It can be divided in two parts, 2313110 and 22, that added together give a palindrome (2313132).

The spelling of 231311022 in words is "two hundred thirty-one million, three hundred eleven thousand, twenty-two".