85537213 has 2 divisors, whose sum is σ = 85537214. Its totient is φ = 85537212.

The previous prime is 85537187. The next prime is 85537241. The reversal of 85537213 is 31273558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65983129 + 19554084 = 8123^2 + 4422^2 .

It is a cyclic number.

It is not a de Polignac number, because 85537213 - 2⁵ = 85537181 is a prime.

It is a super-2 number, since 2×85537213² = 14633229615614738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85534213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42768606 + 42768607.

It is an arithmetic number, because the mean of its divisors is an integer number (42768607).

Almost surely, 2^85537213 is an apocalyptic number.

It is an amenable number.

85537213 is a deficient number, since it is larger than the sum of its proper divisors (1).

85537213 is an equidigital number, since it uses as much as digits as its factorization.

85537213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 85537213 is about 9248.6330341300. The cubic root of 85537213 is about 440.6073104781.

The spelling of 85537213 in words is "eighty-five million, five hundred thirty-seven thousand, two hundred thirteen".