231140022 has 8 divisors (see below), whose sum is σ = 462280056. Its totient is φ = 77046672.

The previous prime is 231139957. The next prime is 231140023. The reversal of 231140022 is 220041132.

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

231140022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 231139983 and 231140010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231140023) 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, 19261663 + ... + 19261674.

It is an arithmetic number, because the mean of its divisors is an integer number (57785007).

Almost surely, 2^231140022 is an apocalyptic number.

231140022 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.

231140022 is a wasteful number, since it uses less digits than its factorization.

231140022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38523342.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 231140022 is about 15203.2898413468. The cubic root of 231140022 is about 613.7031938068.

Adding to 231140022 its reverse (220041132), we get a palindrome (451181154).

The spelling of 231140022 in words is "two hundred thirty-one million, one hundred forty thousand, twenty-two".