231420542 has 16 divisors (see below), whose sum is σ = 350449200. Its totient is φ = 114608832.

The previous prime is 231420529. The next prime is 231420547. The reversal of 231420542 is 245024132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231420547) 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 7 ways as a sum of consecutive naturals, for example, 131138 + ... + 132890.

It is an arithmetic number, because the mean of its divisors is an integer number (21903075).

Almost surely, 2^231420542 is an apocalyptic number.

231420542 is a deficient number, since it is larger than the sum of its proper divisors (119028658).

231420542 is a wasteful number, since it uses less digits than its factorization.

231420542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 231420542 is about 15212.5126787129. The cubic root of 231420542 is about 613.9513643319.

Adding to 231420542 its reverse (245024132), we get a palindrome (476444674).

The spelling of 231420542 in words is "two hundred thirty-one million, four hundred twenty thousand, five hundred forty-two".