385812231 has 16 divisors (see below), whose sum is σ = 599904000. Its totient is φ = 220463544.

The previous prime is 385812199. The next prime is 385812239. The reversal of 385812231 is 132218583.

It is not a de Polignac number, because 385812231 - 2⁵ = 385812199 is a prime.

It is a super-2 number, since 2×385812231² = 297702155178394722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 385812192 and 385812201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385812239) 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 15 ways as a sum of consecutive naturals, for example, 186441 + ... + 188498.

It is an arithmetic number, because the mean of its divisors is an integer number (37494000).

Almost surely, 2^385812231 is an apocalyptic number.

385812231 is a deficient number, since it is larger than the sum of its proper divisors (214091769).

385812231 is an equidigital number, since it uses as much as digits as its factorization.

385812231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374963 (or 374949 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 385812231 is about 19642.1035278811. The cubic root of 385812231 is about 727.9898605590.

The spelling of 385812231 in words is "three hundred eighty-five million, eight hundred twelve thousand, two hundred thirty-one".