85331251181 has 4 divisors (see below), whose sum is σ = 93088637664. Its totient is φ = 77573864700.

The previous prime is 85331251163. The next prime is 85331251183. The reversal of 85331251181 is 18115213358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85331251181 is a prime.

It is a super-2 number, since 2×85331251181² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85331251183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3878693225 + ... + 3878693246.

It is an arithmetic number, because the mean of its divisors is an integer number (23272159416).

Almost surely, 2^85331251181 is an apocalyptic number.

It is an amenable number.

85331251181 is a deficient number, since it is larger than the sum of its proper divisors (7757386483).

85331251181 is a wasteful number, since it uses less digits than its factorization.

85331251181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7757386482.

The product of its digits is 28800, while the sum is 38.

The spelling of 85331251181 in words is "eighty-five billion, three hundred thirty-one million, two hundred fifty-one thousand, one hundred eighty-one".