2190217 has 2 divisors, whose sum is σ = 2190218. Its totient is φ = 2190216.

The previous prime is 2190203. The next prime is 2190233. The reversal of 2190217 is 7120912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 55696 = 1461^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190217 - 2¹¹ = 2188169 is a prime.

It is not a weakly prime, because it can be changed into another prime (2190277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095108 + 1095109.

It is an arithmetic number, because the mean of its divisors is an integer number (1095109).

2^2190217 is an apocalyptic number.

It is an amenable number.

2190217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190217 is an equidigital number, since it uses as much as digits as its factorization.

2190217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2190217 is about 1479.9381743843. The cubic root of 2190217 is about 129.8660750968.

The spelling of 2190217 in words is "two million, one hundred ninety thousand, two hundred seventeen".