866422231 has 2 divisors, whose sum is σ = 866422232. Its totient is φ = 866422230.

The previous prime is 866422201. The next prime is 866422243. The reversal of 866422231 is 132224668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866422231 - 2¹⁹ = 865897943 is a prime.

It is a super-2 number, since 2×866422231² = 1501374964742034722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866422201) 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 as a sum of consecutive naturals, namely, 433211115 + 433211116.

It is an arithmetic number, because the mean of its divisors is an integer number (433211116).

Almost surely, 2^866422231 is an apocalyptic number.

866422231 is a deficient number, since it is larger than the sum of its proper divisors (1).

866422231 is an equidigital number, since it uses as much as digits as its factorization.

866422231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 866422231 is about 29435.0510616170. The cubic root of 866422231 is about 953.3298590541.

Adding to 866422231 its reverse (132224668), we get a palindrome (998646899).

The spelling of 866422231 in words is "eight hundred sixty-six million, four hundred twenty-two thousand, two hundred thirty-one".