231542844 has 144 divisors (see below), whose sum is σ = 629637120. Its totient is φ = 66044160.

The previous prime is 231542837. The next prime is 231542881. The reversal of 231542844 is 448245132.

231542844 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×231542844² = 107224177215216672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1823109 + ... + 1823235.

It is an arithmetic number, because the mean of its divisors is an integer number (4372480).

Almost surely, 2^231542844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231542844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314818560).

231542844 is an abundant number, since it is smaller than the sum of its proper divisors (398094276).

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

231542844 is a wasteful number, since it uses less digits than its factorization.

231542844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 205 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

The square root of 231542844 is about 15216.5319307653. The cubic root of 231542844 is about 614.0594997283.

Adding to 231542844 its reverse (448245132), we get a palindrome (679787976).

The spelling of 231542844 in words is "two hundred thirty-one million, five hundred forty-two thousand, eight hundred forty-four".