85881851 has 4 divisors (see below), whose sum is σ = 93689304. Its totient is φ = 78074400.

The previous prime is 85881823. The next prime is 85881883. The reversal of 85881851 is 15818858.

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 85881851 - 2⁶ = 85881787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85881251) 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, 3903710 + ... + 3903731.

It is an arithmetic number, because the mean of its divisors is an integer number (23422326).

Almost surely, 2^85881851 is an apocalyptic number.

85881851 is a deficient number, since it is larger than the sum of its proper divisors (7807453).

85881851 is a wasteful number, since it uses less digits than its factorization.

85881851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7807452.

The product of its digits is 102400, while the sum is 44.

The square root of 85881851 is about 9267.2461389563. The cubic root of 85881851 is about 441.1982678426.

The spelling of 85881851 in words is "eighty-five million, eight hundred eighty-one thousand, eight hundred fifty-one".