85115161 has 2 divisors, whose sum is σ = 85115162. Its totient is φ = 85115160.

The previous prime is 85115159. The next prime is 85115171. The reversal of 85115161 is 16151158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 16556761 = 8280^2 + 4069^2 .

It is a cyclic number.

It is not a de Polignac number, because 85115161 - 2¹ = 85115159 is a prime.

Together with 85115159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85115171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42557580 + 42557581.

It is an arithmetic number, because the mean of its divisors is an integer number (42557581).

Almost surely, 2^85115161 is an apocalyptic number.

It is an amenable number.

85115161 is a deficient number, since it is larger than the sum of its proper divisors (1).

85115161 is an equidigital number, since it uses as much as digits as its factorization.

85115161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 28.

The square root of 85115161 is about 9225.7878254380. The cubic root of 85115161 is about 439.8814436092.

The spelling of 85115161 in words is "eighty-five million, one hundred fifteen thousand, one hundred sixty-one".