2215399 has 2 divisors, whose sum is σ = 2215400. Its totient is φ = 2215398.

The previous prime is 2215393. The next prime is 2215417. The reversal of 2215399 is 9935122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2215399 - 2²¹ = 118247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2215399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2215393) 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, 1107699 + 1107700.

It is an arithmetic number, because the mean of its divisors is an integer number (1107700).

2^2215399 is an apocalyptic number.

2215399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215399 is an equidigital number, since it uses as much as digits as its factorization.

2215399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 2215399 is about 1488.4216472492. The cubic root of 2215399 is about 130.3618910494.

It can be divided in two parts, 2215 and 399, that multiplied together give a triangular number (883785 = T₁₃₂₉).

The spelling of 2215399 in words is "two million, two hundred fifteen thousand, three hundred ninety-nine".