85382281 has 2 divisors, whose sum is σ = 85382282. Its totient is φ = 85382280.

The previous prime is 85382179. The next prime is 85382287. The reversal of 85382281 is 18228358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56866681 + 28515600 = 7541^2 + 5340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85382281 is a prime.

It is a super-2 number, since 2×85382281² = 14580267817525922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85382281.

It is not a weakly prime, because it can be changed into another prime (85382287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42691140 + 42691141.

It is an arithmetic number, because the mean of its divisors is an integer number (42691141).

Almost surely, 2^85382281 is an apocalyptic number.

It is an amenable number.

85382281 is a deficient number, since it is larger than the sum of its proper divisors (1).

85382281 is an equidigital number, since it uses as much as digits as its factorization.

85382281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 85382281 is about 9240.2532973940. The cubic root of 85382281 is about 440.3411283640.

The spelling of 85382281 in words is "eighty-five million, three hundred eighty-two thousand, two hundred eighty-one".