231544820663832 has 128 divisors (see below), whose sum is σ = 633890688802560. Its totient is φ = 70052606507520.

The previous prime is 231544820663831. The next prime is 231544820663909. The reversal of 231544820663832 is 238366028445132.

It is a super-2 number, since 2×231544820663832² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231544820663831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15723943 + ... + 26652054.

It is an arithmetic number, because the mean of its divisors is an integer number (4952271006270).

Almost surely, 2^{231544820663832} is an apocalyptic number.

It is an amenable number.

231544820663832 is an abundant number, since it is smaller than the sum of its proper divisors (402345868138728).

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

231544820663832 is a wasteful number, since it uses less digits than its factorization.

231544820663832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42376313 (or 42376309 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 57.

The spelling of 231544820663832 in words is "two hundred thirty-one trillion, five hundred forty-four billion, eight hundred twenty million, six hundred sixty-three thousand, eight hundred thirty-two".