85555331 has 4 divisors (see below), whose sum is σ = 89275152. Its totient is φ = 81835512.

The previous prime is 85555297. The next prime is 85555387. The reversal of 85555331 is 13355558.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85555331 is a prime.

It is a super-2 number, since 2×85555331² = 14639429325039122, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 85555291 and 85555300.

It is not an unprimeable number, because it can be changed into a prime (85555031) 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, 1859876 + ... + 1859921.

It is an arithmetic number, because the mean of its divisors is an integer number (22318788).

Almost surely, 2^85555331 is an apocalyptic number.

85555331 is a deficient number, since it is larger than the sum of its proper divisors (3719821).

85555331 is a wasteful number, since it uses less digits than its factorization.

85555331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719820.

The product of its digits is 45000, while the sum is 35.

The square root of 85555331 is about 9249.6124783690. The cubic root of 85555331 is about 440.6384172498.

The spelling of 85555331 in words is "eighty-five million, five hundred fifty-five thousand, three hundred thirty-one".