85243331 has 2 divisors, whose sum is σ = 85243332. Its totient is φ = 85243330.

The previous prime is 85243303. The next prime is 85243337. The reversal of 85243331 is 13334258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85243331 - 2¹⁰ = 85242307 is a prime.

It is a super-2 number, since 2×85243331² = 14532850959951122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85243294 and 85243303.

It is not a weakly prime, because it can be changed into another prime (85243337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42621665 + 42621666.

It is an arithmetic number, because the mean of its divisors is an integer number (42621666).

Almost surely, 2^85243331 is an apocalyptic number.

85243331 is a deficient number, since it is larger than the sum of its proper divisors (1).

85243331 is an equidigital number, since it uses as much as digits as its factorization.

85243331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 85243331 is about 9232.7315026486. The cubic root of 85243331 is about 440.1021302179.

Adding to 85243331 its reverse (13334258), we get a palindrome (98577589).

The spelling of 85243331 in words is "eighty-five million, two hundred forty-three thousand, three hundred thirty-one".