85181854 has 4 divisors (see below), whose sum is σ = 127772784. Its totient is φ = 42590926.

The previous prime is 85181851. The next prime is 85181861. The reversal of 85181854 is 45818158.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21295462 + ... + 21295465.

It is an arithmetic number, because the mean of its divisors is an integer number (31943196).

Almost surely, 2^85181854 is an apocalyptic number.

85181854 is a deficient number, since it is larger than the sum of its proper divisors (42590930).

85181854 is a wasteful number, since it uses less digits than its factorization.

85181854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42590929.

The product of its digits is 51200, while the sum is 40.

The square root of 85181854 is about 9229.4016057380. The cubic root of 85181854 is about 439.9963050654.

The spelling of 85181854 in words is "eighty-five million, one hundred eighty-one thousand, eight hundred fifty-four".