231140346 has 16 divisors (see below), whose sum is σ = 469859808. Its totient is φ = 75783600.

The previous prime is 231140341. The next prime is 231140359. The reversal of 231140346 is 643041132.

It is not an unprimeable number, because it can be changed into a prime (231140341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315400 + ... + 316131.

It is an arithmetic number, because the mean of its divisors is an integer number (29366238).

Almost surely, 2^231140346 is an apocalyptic number.

231140346 is an abundant number, since it is smaller than the sum of its proper divisors (238719462).

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

231140346 is a wasteful number, since it uses less digits than its factorization.

231140346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631597.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 231140346 is about 15203.3004969316. The cubic root of 231140346 is about 613.7034805590.

Adding to 231140346 its reverse (643041132), we get a palindrome (874181478).

The spelling of 231140346 in words is "two hundred thirty-one million, one hundred forty thousand, three hundred forty-six".