85222447 has 2 divisors, whose sum is σ = 85222448. Its totient is φ = 85222446.

The previous prime is 85222439. The next prime is 85222451. The reversal of 85222447 is 74422258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85222447 - 2³ = 85222439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85222457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42611223 + 42611224.

It is an arithmetic number, because the mean of its divisors is an integer number (42611224).

Almost surely, 2^85222447 is an apocalyptic number.

85222447 is a deficient number, since it is larger than the sum of its proper divisors (1).

85222447 is an equidigital number, since it uses as much as digits as its factorization.

85222447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 34.

The square root of 85222447 is about 9231.6004571255. The cubic root of 85222447 is about 440.0661866688.

The spelling of 85222447 in words is "eighty-five million, two hundred twenty-two thousand, four hundred forty-seven".