85518541 has 2 divisors, whose sum is σ = 85518542. Its totient is φ = 85518540.

The previous prime is 85518539. The next prime is 85518569. The reversal of 85518541 is 14581558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70073641 + 15444900 = 8371^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 85518541 - 2¹ = 85518539 is a prime.

Together with 85518539, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85518541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85518341) 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, 42759270 + 42759271.

It is an arithmetic number, because the mean of its divisors is an integer number (42759271).

Almost surely, 2^85518541 is an apocalyptic number.

It is an amenable number.

85518541 is a deficient number, since it is larger than the sum of its proper divisors (1).

85518541 is an equidigital number, since it uses as much as digits as its factorization.

85518541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32000, while the sum is 37.

The square root of 85518541 is about 9247.6235325623. The cubic root of 85518541 is about 440.5752479480.

The spelling of 85518541 in words is "eighty-five million, five hundred eighteen thousand, five hundred forty-one".