231228185 has 8 divisors (see below), whose sum is σ = 281382336. Its totient is φ = 182376880.

The previous prime is 231228161. The next prime is 231228199. The reversal of 231228185 is 581822132.

It is a happy number.

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

It is not a de Polignac number, because 231228185 - 2⁶ = 231228121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325319 + ... + 326028.

It is an arithmetic number, because the mean of its divisors is an integer number (35172792).

Almost surely, 2^231228185 is an apocalyptic number.

It is an amenable number.

231228185 is a deficient number, since it is larger than the sum of its proper divisors (50154151).

231228185 is an equidigital number, since it uses as much as digits as its factorization.

231228185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651423.

The product of its digits is 7680, while the sum is 32.

The square root of 231228185 is about 15206.1890360471. The cubic root of 231228185 is about 613.7812115043.

The spelling of 231228185 in words is "two hundred thirty-one million, two hundred twenty-eight thousand, one hundred eighty-five".