385417231 has 2 divisors, whose sum is σ = 385417232. Its totient is φ = 385417230.

The previous prime is 385417229. The next prime is 385417243. The reversal of 385417231 is 132714583.

It is a weak prime.

It is an emirp because it is prime and its reverse (132714583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385417231 - 2¹ = 385417229 is a prime.

It is a super-2 number, since 2×385417231² = 297092883903414722, which contains 22 as substring.

Together with 385417229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385417631) 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 as a sum of consecutive naturals, namely, 192708615 + 192708616.

It is an arithmetic number, because the mean of its divisors is an integer number (192708616).

Almost surely, 2^385417231 is an apocalyptic number.

385417231 is a deficient number, since it is larger than the sum of its proper divisors (1).

385417231 is an equidigital number, since it uses as much as digits as its factorization.

385417231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 385417231 is about 19632.0460217472. The cubic root of 385417231 is about 727.7413336312.

The spelling of 385417231 in words is "three hundred eighty-five million, four hundred seventeen thousand, two hundred thirty-one".