231609355 has 8 divisors (see below), whose sum is σ = 278018352. Its totient is φ = 185229408.

The previous prime is 231609349. The next prime is 231609359. The reversal of 231609355 is 553906132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231609355 - 2³ = 231609347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231609355.

It is not an unprimeable number, because it can be changed into a prime (231609359) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18772 + ... + 28558.

It is an arithmetic number, because the mean of its divisors is an integer number (34752294).

Almost surely, 2^231609355 is an apocalyptic number.

231609355 is a deficient number, since it is larger than the sum of its proper divisors (46408997).

231609355 is an equidigital number, since it uses as much as digits as its factorization.

231609355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14525.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 231609355 is about 15218.7172586917. The cubic root of 231609355 is about 614.1182905777.

The spelling of 231609355 in words is "two hundred thirty-one million, six hundred nine thousand, three hundred fifty-five".