85161541 has 2 divisors, whose sum is σ = 85161542. Its totient is φ = 85161540.

The previous prime is 85161523. The next prime is 85161563. The reversal of 85161541 is 14516158.

85161541 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 14853316 = 8385^2 + 3854^2 .

It is a cyclic number.

It is not a de Polignac number, because 85161541 - 2⁷ = 85161413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85161511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42580770 + 42580771.

It is an arithmetic number, because the mean of its divisors is an integer number (42580771).

Almost surely, 2^85161541 is an apocalyptic number.

It is an amenable number.

85161541 is a deficient number, since it is larger than the sum of its proper divisors (1).

85161541 is an equidigital number, since it uses as much as digits as its factorization.

85161541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 31.

The square root of 85161541 is about 9228.3010895831. The cubic root of 85161541 is about 439.9613275240.

Adding to 85161541 its reverse (14516158), we get a palindrome (99677699).

The spelling of 85161541 in words is "eighty-five million, one hundred sixty-one thousand, five hundred forty-one".