2042853581 has 4 divisors (see below), whose sum is σ = 2043259164. Its totient is φ = 2042448000.

The previous prime is 2042853563. The next prime is 2042853607. The reversal of 2042853581 is 1853582402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 583995556 + 1458858025 = 24166^2 + 38195^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042853581 - 2¹⁸ = 2042591437 is a prime.

It is a super-2 number, since 2×2042853581² = 8346501506809047122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042853541) 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, 195140 + ... + 205341.

It is an arithmetic number, because the mean of its divisors is an integer number (510814791).

Almost surely, 2^2042853581 is an apocalyptic number.

It is an amenable number.

2042853581 is a deficient number, since it is larger than the sum of its proper divisors (405583).

2042853581 is an equidigital number, since it uses as much as digits as its factorization.

2042853581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405582.

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 2042853581 is about 45197.9377958774. The cubic root of 2042853581 is about 1268.8562213283.

The spelling of 2042853581 in words is "two billion, forty-two million, eight hundred fifty-three thousand, five hundred eighty-one".