388231 has 2 divisors, whose sum is σ = 388232. Its totient is φ = 388230.

The previous prime is 388211. The next prime is 388237. The reversal of 388231 is 132883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388231 - 2¹⁵ = 355463 is a prime.

It is a super-2 number, since 2×388231² = 301446618722, which contains 22 as substring.

388231 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 388196 and 388205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194115 + 194116.

It is an arithmetic number, because the mean of its divisors is an integer number (194116).

2³⁸⁸²³¹ is an apocalyptic number.

388231 is a deficient number, since it is larger than the sum of its proper divisors (1).

388231 is an equidigital number, since it uses as much as digits as its factorization.

388231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 388231 is about 623.0818565807. The cubic root of 388231 is about 72.9508019040.

The spelling of 388231 in words is "three hundred eighty-eight thousand, two hundred thirty-one".