85109541 has 16 divisors (see below), whose sum is σ = 124338240. Its totient is φ = 51355520.

The previous prime is 85109537. The next prime is 85109551. The reversal of 85109541 is 14590158.

It is a cyclic number.

It is not a de Polignac number, because 85109541 - 2² = 85109537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85109551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155 + ... + 13223.

It is an arithmetic number, because the mean of its divisors is an integer number (7771140).

Almost surely, 2^85109541 is an apocalyptic number.

It is an amenable number.

85109541 is a deficient number, since it is larger than the sum of its proper divisors (39228699).

85109541 is a wasteful number, since it uses less digits than its factorization.

85109541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11316.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 85109541 is about 9225.4832393756. The cubic root of 85109541 is about 439.8717618710.

Adding to 85109541 its reverse (14590158), we get a palindrome (99699699).

The spelling of 85109541 in words is "eighty-five million, one hundred nine thousand, five hundred forty-one".