2085517573 has 4 divisors (see below), whose sum is σ = 2085609708. Its totient is φ = 2085425440.

The previous prime is 2085517561. The next prime is 2085517579. The reversal of 2085517573 is 3757155802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3757155802 = 2 ⋅1878577901.

It can be written as a sum of positive squares in 2 ways, for example, as 1223390529 + 862127044 = 34977^2 + 29362^2 .

It is a cyclic number.

It is not a de Polignac number, because 2085517573 - 2¹³ = 2085509381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2085517579) 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, 13953 + ... + 66073.

It is an arithmetic number, because the mean of its divisors is an integer number (521402427).

Almost surely, 2^2085517573 is an apocalyptic number.

It is an amenable number.

2085517573 is a deficient number, since it is larger than the sum of its proper divisors (92135).

2085517573 is an equidigital number, since it uses as much as digits as its factorization.

2085517573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92134.

The product of its (nonzero) digits is 294000, while the sum is 43.

The square root of 2085517573 is about 45667.4673372632. The cubic root of 2085517573 is about 1277.6285790137.

The spelling of 2085517573 in words is "two billion, eighty-five million, five hundred seventeen thousand, five hundred seventy-three".