2131771 has 2 divisors, whose sum is σ = 2131772. Its totient is φ = 2131770.

The previous prime is 2131721. The next prime is 2131793. The reversal of 2131771 is 1771312.

It is an a-pointer prime, because the next prime (2131793) can be obtained adding 2131771 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131771 - 2¹⁷ = 2000699 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065885 + 1065886.

It is an arithmetic number, because the mean of its divisors is an integer number (1065886).

2^2131771 is an apocalyptic number.

2131771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131771 is an equidigital number, since it uses as much as digits as its factorization.

2131771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294, while the sum is 22.

The square root of 2131771 is about 1460.0585604694. The cubic root of 2131771 is about 128.7004849344.

The spelling of 2131771 in words is "two million, one hundred thirty-one thousand, seven hundred seventy-one".