2199697509 has 4 divisors (see below), whose sum is σ = 2932930016. Its totient is φ = 1466465004.

The previous prime is 2199697481. The next prime is 2199697537. The reversal of 2199697509 is 9057969912.

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 an interprime number because it is at equal distance from previous prime (2199697481) and next prime (2199697537).

It is not a de Polignac number, because 2199697509 - 2⁵ = 2199697477 is a prime.

It is a super-2 number, since 2×2199697509² = 9677338262201610162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199697559) 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, 366616249 + ... + 366616254.

It is an arithmetic number, because the mean of its divisors is an integer number (733232504).

Almost surely, 2^2199697509 is an apocalyptic number.

It is an amenable number.

2199697509 is a deficient number, since it is larger than the sum of its proper divisors (733232507).

2199697509 is an equidigital number, since it uses as much as digits as its factorization.

2199697509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733232506.

The product of its (nonzero) digits is 2755620, while the sum is 57.

The square root of 2199697509 is about 46900.9329224910. The cubic root of 2199697509 is about 1300.5318354514.

The spelling of 2199697509 in words is "two billion, one hundred ninety-nine million, six hundred ninety-seven thousand, five hundred nine".