2591031671 has 4 divisors (see below), whose sum is σ = 2661059592. Its totient is φ = 2521003752.

The previous prime is 2591031647. The next prime is 2591031683. The reversal of 2591031671 is 1761301952.

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

It is a cyclic number.

It is not a de Polignac number, because 2591031671 - 2¹⁸ = 2590769527 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 (2591031601) 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, 35013905 + ... + 35013978.

It is an arithmetic number, because the mean of its divisors is an integer number (665264898).

Almost surely, 2^2591031671 is an apocalyptic number.

2591031671 is a deficient number, since it is larger than the sum of its proper divisors (70027921).

2591031671 is an equidigital number, since it uses as much as digits as its factorization.

2591031671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70027920.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 2591031671 is about 50902.1774681595. The cubic root of 2591031671 is about 1373.4860111164.

The spelling of 2591031671 in words is "two billion, five hundred ninety-one million, thirty-one thousand, six hundred seventy-one".