85810229 has 2 divisors, whose sum is σ = 85810230. Its totient is φ = 85810228.

The previous prime is 85810223. The next prime is 85810261. The reversal of 85810229 is 92201858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81036004 + 4774225 = 9002^2 + 2185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85810229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85810223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42905114 + 42905115.

It is an arithmetic number, because the mean of its divisors is an integer number (42905115).

Almost surely, 2^85810229 is an apocalyptic number.

It is an amenable number.

85810229 is a deficient number, since it is larger than the sum of its proper divisors (1).

85810229 is an equidigital number, since it uses as much as digits as its factorization.

85810229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 85810229 is about 9263.3810782025. The cubic root of 85810229 is about 441.0755865455.

The spelling of 85810229 in words is "eighty-five million, eight hundred ten thousand, two hundred twenty-nine".