85982531 has 2 divisors, whose sum is σ = 85982532. Its totient is φ = 85982530.

The previous prime is 85982503. The next prime is 85982537. The reversal of 85982531 is 13528958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85982531 - 2¹⁴ = 85966147 is a prime.

It is a super-2 number, since 2×85982531² = 14785991274331922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (85982537) 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, 42991265 + 42991266.

It is an arithmetic number, because the mean of its divisors is an integer number (42991266).

Almost surely, 2^85982531 is an apocalyptic number.

85982531 is a deficient number, since it is larger than the sum of its proper divisors (1).

85982531 is an equidigital number, since it uses as much as digits as its factorization.

85982531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 85982531 is about 9272.6765823035. The cubic root of 85982531 is about 441.3706073007.

The spelling of 85982531 in words is "eighty-five million, nine hundred eighty-two thousand, five hundred thirty-one".