231442842 has 16 divisors (see below), whose sum is σ = 464368320. Its totient is φ = 76900512.

The previous prime is 231442831. The next prime is 231442847. The reversal of 231442842 is 248244132.

It is a super-2 number, since 2×231442842² = 107131578226073928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231442847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59742 + ... + 63497.

It is an arithmetic number, because the mean of its divisors is an integer number (29023020).

Almost surely, 2^231442842 is an apocalyptic number.

231442842 is an abundant number, since it is smaller than the sum of its proper divisors (232925478).

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

231442842 is a wasteful number, since it uses less digits than its factorization.

231442842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123557.

The product of its digits is 12288, while the sum is 30.

The square root of 231442842 is about 15213.2456103226. The cubic root of 231442842 is about 613.9710840963.

Adding to 231442842 its reverse (248244132), we get a palindrome (479686974).

The spelling of 231442842 in words is "two hundred thirty-one million, four hundred forty-two thousand, eight hundred forty-two".