231959385 has 72 divisors (see below), whose sum is σ = 475899840. Its totient is φ = 104182848.

The previous prime is 231959383. The next prime is 231959389. The reversal of 231959385 is 583959132.

It is not a de Polignac number, because 231959385 - 2¹ = 231959383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 231959385.

It is not an unprimeable number, because it can be changed into a prime (231959383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 129204 + ... + 130986.

It is an arithmetic number, because the mean of its divisors is an integer number (6609720).

Almost surely, 2^231959385 is an apocalyptic number.

It is an amenable number.

231959385 is an abundant number, since it is smaller than the sum of its proper divisors (243940455).

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

231959385 is a wasteful number, since it uses less digits than its factorization.

231959385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867 (or 1857 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 231959385 is about 15230.2129006787. The cubic root of 231959385 is about 614.4275061055.

The spelling of 231959385 in words is "two hundred thirty-one million, nine hundred fifty-nine thousand, three hundred eighty-five".