85752281 has 2 divisors, whose sum is σ = 85752282. Its totient is φ = 85752280.

The previous prime is 85752239. The next prime is 85752313. The reversal of 85752281 is 18225758.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80712256 + 5040025 = 8984^2 + 2245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85752281 is a prime.

It is a super-2 number, since 2×85752281² = 14706907393405922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85752481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42876140 + 42876141.

It is an arithmetic number, because the mean of its divisors is an integer number (42876141).

Almost surely, 2^85752281 is an apocalyptic number.

It is an amenable number.

85752281 is a deficient number, since it is larger than the sum of its proper divisors (1).

85752281 is an equidigital number, since it uses as much as digits as its factorization.

85752281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44800, while the sum is 38.

The square root of 85752281 is about 9260.2527503303. The cubic root of 85752281 is about 440.9762774692.

The spelling of 85752281 in words is "eighty-five million, seven hundred fifty-two thousand, two hundred eighty-one".