231785120 has 48 divisors (see below), whose sum is σ = 625822848. Its totient is φ = 79468800.

The previous prime is 231785117. The next prime is 231785129. The reversal of 231785120 is 21587132.

It is not an unprimeable number, because it can be changed into a prime (231785129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102356 + ... + 104595.

It is an arithmetic number, because the mean of its divisors is an integer number (13037976).

Almost surely, 2^231785120 is an apocalyptic number.

231785120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231785120 is an abundant number, since it is smaller than the sum of its proper divisors (394037728).

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

231785120 is a wasteful number, since it uses less digits than its factorization.

231785120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206973 (or 206965 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 231785120 is about 15224.4907960825. The cubic root of 231785120 is about 614.2735998023.

The spelling of 231785120 in words is "two hundred thirty-one million, seven hundred eighty-five thousand, one hundred twenty".