85131854 has 4 divisors (see below), whose sum is σ = 127697784. Its totient is φ = 42565926.

The previous prime is 85131841. The next prime is 85131881. The reversal of 85131854 is 45813158.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21282962 + ... + 21282965.

It is an arithmetic number, because the mean of its divisors is an integer number (31924446).

Almost surely, 2^85131854 is an apocalyptic number.

85131854 is a deficient number, since it is larger than the sum of its proper divisors (42565930).

85131854 is a wasteful number, since it uses less digits than its factorization.

85131854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42565929.

The product of its digits is 19200, while the sum is 35.

The square root of 85131854 is about 9226.6924734707. The cubic root of 85131854 is about 439.9101986155.

The spelling of 85131854 in words is "eighty-five million, one hundred thirty-one thousand, eight hundred fifty-four".