85120511 has 4 divisors (see below), whose sum is σ = 97280592. Its totient is φ = 72960432.

The previous prime is 85120489. The next prime is 85120517. The reversal of 85120511 is 11502158.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85120511 - 2²² = 80926207 is a prime.

It is a super-2 number, since 2×85120511² = 14491002785802242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85120517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6080030 + ... + 6080043.

It is an arithmetic number, because the mean of its divisors is an integer number (24320148).

Almost surely, 2^85120511 is an apocalyptic number.

85120511 is a deficient number, since it is larger than the sum of its proper divisors (12160081).

85120511 is a wasteful number, since it uses less digits than its factorization.

85120511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160080.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 85120511 is about 9226.0777690197. The cubic root of 85120511 is about 439.8906598146.

Adding to 85120511 its reverse (11502158), we get a palindrome (96622669).

The spelling of 85120511 in words is "eighty-five million, one hundred twenty thousand, five hundred eleven".