2153331209 has 2 divisors, whose sum is σ = 2153331210. Its totient is φ = 2153331208.

The previous prime is 2153331181. The next prime is 2153331241. The reversal of 2153331209 is 9021333512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1594245184 + 559086025 = 39928^2 + 23645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153331209 is a prime.

It is not a weakly prime, because it can be changed into another prime (2153331709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076665604 + 1076665605.

It is an arithmetic number, because the mean of its divisors is an integer number (1076665605).

Almost surely, 2^2153331209 is an apocalyptic number.

It is an amenable number.

2153331209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153331209 is an equidigital number, since it uses as much as digits as its factorization.

2153331209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 2153331209 is about 46403.9999245755. Note that the first 4 decimals coincide. The cubic root of 2153331209 is about 1291.3291208573.

The spelling of 2153331209 in words is "two billion, one hundred fifty-three million, three hundred thirty-one thousand, two hundred nine".