2148632209 has 2 divisors, whose sum is σ = 2148632210. Its totient is φ = 2148632208.

The previous prime is 2148632177. The next prime is 2148632237. The reversal of 2148632209 is 9022368412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1857179025 + 291453184 = 43095^2 + 17072^2 .

It is a cyclic number.

It is not a de Polignac number, because 2148632209 - 2⁵ = 2148632177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2148632509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074316104 + 1074316105.

It is an arithmetic number, because the mean of its divisors is an integer number (1074316105).

Almost surely, 2^2148632209 is an apocalyptic number.

It is an amenable number.

2148632209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148632209 is an equidigital number, since it uses as much as digits as its factorization.

2148632209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 2148632209 is about 46353.3408612583. The cubic root of 2148632209 is about 1290.3891238419.

The spelling of 2148632209 in words is "two billion, one hundred forty-eight million, six hundred thirty-two thousand, two hundred nine".