231740146 has 16 divisors (see below), whose sum is σ = 380515968. Its totient is φ = 104974000.

The previous prime is 231740143. The next prime is 231740177. The reversal of 231740146 is 641047132.

It is not an unprimeable number, because it can be changed into a prime (231740143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11530 + ... + 24421.

It is an arithmetic number, because the mean of its divisors is an integer number (23782248).

Almost surely, 2^231740146 is an apocalyptic number.

231740146 is a deficient number, since it is larger than the sum of its proper divisors (148775822).

231740146 is a wasteful number, since it uses less digits than its factorization.

231740146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36257.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 231740146 is about 15223.0136963743. The cubic root of 231740146 is about 614.2338674159.

Adding to 231740146 its reverse (641047132), we get a palindrome (872787278).

The spelling of 231740146 in words is "two hundred thirty-one million, seven hundred forty thousand, one hundred forty-six".