2156279 has 2 divisors, whose sum is σ = 2156280. Its totient is φ = 2156278.

The previous prime is 2156269. The next prime is 2156299. The reversal of 2156279 is 9726512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2156279 - 2⁸ = 2156023 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₁₅₉₆₈₃ and since 2156279 and 159683 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078139 + 1078140.

It is an arithmetic number, because the mean of its divisors is an integer number (1078140).

2^2156279 is an apocalyptic number.

2156279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156279 is an equidigital number, since it uses as much as digits as its factorization.

2156279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 2156279 is about 1468.4273901014. The cubic root of 2156279 is about 129.1918104826.

The spelling of 2156279 in words is "two million, one hundred fifty-six thousand, two hundred seventy-nine".