2543551671 has 4 divisors (see below), whose sum is σ = 3391402232. Its totient is φ = 1695701112.

The previous prime is 2543551657. The next prime is 2543551711. The reversal of 2543551671 is 1761553452.

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

It is not a de Polignac number, because 2543551671 - 2¹⁷ = 2543420599 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 (2543551601) 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, 423925276 + ... + 423925281.

It is an arithmetic number, because the mean of its divisors is an integer number (847850558).

Almost surely, 2^2543551671 is an apocalyptic number.

2543551671 is a deficient number, since it is larger than the sum of its proper divisors (847850561).

2543551671 is an equidigital number, since it uses as much as digits as its factorization.

2543551671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847850560.

The product of its digits is 126000, while the sum is 39.

The square root of 2543551671 is about 50433.6363055451. The cubic root of 2543551671 is about 1365.0446426382.

The spelling of 2543551671 in words is "two billion, five hundred forty-three million, five hundred fifty-one thousand, six hundred seventy-one".