2146550209 has 2 divisors, whose sum is σ = 2146550210. Its totient is φ = 2146550208.

The previous prime is 2146550177. The next prime is 2146550257. The reversal of 2146550209 is 9020556412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2141097984 + 5452225 = 46272^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146550209 - 2⁵ = 2146550177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2146550009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073275104 + 1073275105.

It is an arithmetic number, because the mean of its divisors is an integer number (1073275105).

Almost surely, 2^2146550209 is an apocalyptic number.

It is an amenable number.

2146550209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146550209 is an equidigital number, since it uses as much as digits as its factorization.

2146550209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2146550209 is about 46330.8774900713. The cubic root of 2146550209 is about 1289.9721983873.

The spelling of 2146550209 in words is "two billion, one hundred forty-six million, five hundred fifty thousand, two hundred nine".