85280111 has 4 divisors (see below), whose sum is σ = 97462992. Its totient is φ = 73097232.

The previous prime is 85280099. The next prime is 85280131. The reversal of 85280111 is 11108258.

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 85280111 - 2¹⁴ = 85263727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85280131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6091430 + ... + 6091443.

It is an arithmetic number, because the mean of its divisors is an integer number (24365748).

Almost surely, 2^85280111 is an apocalyptic number.

85280111 is a deficient number, since it is larger than the sum of its proper divisors (12182881).

85280111 is a wasteful number, since it uses less digits than its factorization.

85280111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12182880.

The product of its (nonzero) digits is 640, while the sum is 26.

The square root of 85280111 is about 9234.7231144198. The cubic root of 85280111 is about 440.1654181751.

Adding to 85280111 its reverse (11108258), we get a palindrome (96388369).

The spelling of 85280111 in words is "eighty-five million, two hundred eighty thousand, one hundred eleven".