2156071 has 2 divisors, whose sum is σ = 2156072. Its totient is φ = 2156070.

The previous prime is 2156053. The next prime is 2156083. The reversal of 2156071 is 1706512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156071 - 2⁵ = 2156039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078035 + 1078036.

It is an arithmetic number, because the mean of its divisors is an integer number (1078036).

2^2156071 is an apocalyptic number.

2156071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156071 is an equidigital number, since it uses as much as digits as its factorization.

2156071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2156071 is about 1468.3565643263. The cubic root of 2156071 is about 129.1876562953.

The spelling of 2156071 in words is "two million, one hundred fifty-six thousand, seventy-one".