231155234044 has 18 divisors (see below), whose sum is σ = 470566012560. Its totient is φ = 99066528792.

The previous prime is 231155234039. The next prime is 231155234077. The reversal of 231155234044 is 440432551132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589681524 + ... + 589681915.

Almost surely, 2^231155234044 is an apocalyptic number.

It is an amenable number.

231155234044 is an abundant number, since it is smaller than the sum of its proper divisors (239410778516).

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

231155234044 is a wasteful number, since it uses less digits than its factorization.

231155234044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179363457 (or 1179363448 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 231155234044 its reverse (440432551132), we get a palindrome (671587785176).

The spelling of 231155234044 in words is "two hundred thirty-one billion, one hundred fifty-five million, two hundred thirty-four thousand, forty-four".