2190005209 has 24 divisors (see below), whose sum is σ = 2641429440. Its totient is φ = 1777968192.

The previous prime is 2190005177. The next prime is 2190005221. The reversal of 2190005209 is 9025000912.

It is not a de Polignac number, because 2190005209 - 2⁵ = 2190005177 is a prime.

It is a super-2 number, since 2×2190005209² = 9592245630894267362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2190005299) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 308502 + ... + 315520.

It is an arithmetic number, because the mean of its divisors is an integer number (110059560).

Almost surely, 2^2190005209 is an apocalyptic number.

2190005209 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2190005209 is a deficient number, since it is larger than the sum of its proper divisors (451424231).

2190005209 is an equidigital number, since it uses as much as digits as its factorization.

2190005209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137 (or 7108 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 2190005209 is about 46797.4914819160. The cubic root of 2190005209 is about 1298.6188900438.

The spelling of 2190005209 in words is "two billion, one hundred ninety million, five thousand, two hundred nine".