2043661571 has 10 divisors (see below), whose sum is σ = 2384132772. Its totient is φ = 1751707860.

The previous prime is 2043661553. The next prime is 2043661597. The reversal of 2043661571 is 1751663402.

It is not a de Polignac number, because 2043661571 - 2¹⁰ = 2043660547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2043661531) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 423185 + ... + 427986.

Almost surely, 2^2043661571 is an apocalyptic number.

2043661571 is a deficient number, since it is larger than the sum of its proper divisors (340471201).

2043661571 is an frugal number, since it uses more digits than its factorization.

2043661571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851199 (or 851178 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 2043661571 is about 45206.8752625085. The cubic root of 2043661571 is about 1269.0234853966.

The spelling of 2043661571 in words is "two billion, forty-three million, six hundred sixty-one thousand, five hundred seventy-one".