85261223 has 2 divisors, whose sum is σ = 85261224. Its totient is φ = 85261222.

The previous prime is 85261213. The next prime is 85261249. The reversal of 85261223 is 32216258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85261223 - 2⁶ = 85261159 is a prime.

It is a super-2 number, since 2×85261223² = 14538952294911458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85261213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42630611 + 42630612.

It is an arithmetic number, because the mean of its divisors is an integer number (42630612).

Almost surely, 2^85261223 is an apocalyptic number.

85261223 is a deficient number, since it is larger than the sum of its proper divisors (1).

85261223 is an equidigital number, since it uses as much as digits as its factorization.

85261223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 85261223 is about 9233.7003958326. The cubic root of 85261223 is about 440.1329195530.

The spelling of 85261223 in words is "eighty-five million, two hundred sixty-one thousand, two hundred twenty-three".