2215979 has 2 divisors, whose sum is σ = 2215980. Its totient is φ = 2215978.

The previous prime is 2215963. The next prime is 2215987. The reversal of 2215979 is 9795122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2215979 - 2⁴ = 2215963 is a prime.

It is not a weakly prime, because it can be changed into another prime (2215949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107989 + 1107990.

It is an arithmetic number, because the mean of its divisors is an integer number (1107990).

2^2215979 is an apocalyptic number.

2215979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215979 is an equidigital number, since it uses as much as digits as its factorization.

2215979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 2215979 is about 1488.6164717616. The cubic root of 2215979 is about 130.3732664720.

The spelling of 2215979 in words is "two million, two hundred fifteen thousand, nine hundred seventy-nine".