2190910217 has 4 divisors (see below), whose sum is σ = 2237525376. Its totient is φ = 2144295060.

The previous prime is 2190910177. The next prime is 2190910223. The reversal of 2190910217 is 7120190912.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2190910217 - 2⁸ = 2190909961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190910277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23307509 + ... + 23307602.

It is an arithmetic number, because the mean of its divisors is an integer number (559381344).

Almost surely, 2^2190910217 is an apocalyptic number.

It is an amenable number.

2190910217 is a deficient number, since it is larger than the sum of its proper divisors (46615159).

2190910217 is an equidigital number, since it uses as much as digits as its factorization.

2190910217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46615158.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 2190910217 is about 46807.1598903416. The cubic root of 2190910217 is about 1298.7977478576.

The spelling of 2190910217 in words is "two billion, one hundred ninety million, nine hundred ten thousand, two hundred seventeen".