2000085581 has 32 divisors (see below), whose sum is σ = 2332915200. Its totient is φ = 1698278400.

The previous prime is 2000085553. The next prime is 2000085587. The reversal of 2000085581 is 1855800002.

It is not a de Polignac number, because 2000085581 - 2²² = 1995891277 is a prime.

It is a super-2 number, since 2×2000085581² = 8000684662648215122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000085587) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1902506 + ... + 1903556.

It is an arithmetic number, because the mean of its divisors is an integer number (72903600).

Almost surely, 2^2000085581 is an apocalyptic number.

It is an amenable number.

2000085581 is a deficient number, since it is larger than the sum of its proper divisors (332829619).

2000085581 is a wasteful number, since it uses less digits than its factorization.

2000085581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2000085581 is about 44722.3163644282. The cubic root of 2000085581 is about 1259.9390205224.

Adding to 2000085581 its reverse (1855800002), we get a palindrome (3855885583).

The spelling of 2000085581 in words is "two billion, eighty-five thousand, five hundred eighty-one".