2131291 has 2 divisors, whose sum is σ = 2131292. Its totient is φ = 2131290.

The previous prime is 2131271. The next prime is 2131319. The reversal of 2131291 is 1921312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131291 - 2¹⁹ = 1607003 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065645 + 1065646.

It is an arithmetic number, because the mean of its divisors is an integer number (1065646).

2^2131291 is an apocalyptic number.

2131291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131291 is an equidigital number, since it uses as much as digits as its factorization.

2131291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 19.

The square root of 2131291 is about 1459.8941742469. The cubic root of 2131291 is about 128.6908245988.

The spelling of 2131291 in words is "two million, one hundred thirty-one thousand, two hundred ninety-one".