2143053509 has 2 divisors, whose sum is σ = 2143053510. Its totient is φ = 2143053508.

The previous prime is 2143053427. The next prime is 2143053547. The reversal of 2143053509 is 9053503412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085373025 + 1057680484 = 32945^2 + 32522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143053509 - 2¹² = 2143049413 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143053109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071526754 + 1071526755.

It is an arithmetic number, because the mean of its divisors is an integer number (1071526755).

Almost surely, 2^2143053509 is an apocalyptic number.

It is an amenable number.

2143053509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143053509 is an equidigital number, since it uses as much as digits as its factorization.

2143053509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 2143053509 is about 46293.1259367954. The cubic root of 2143053509 is about 1289.2713688662.

The spelling of 2143053509 in words is "two billion, one hundred forty-three million, fifty-three thousand, five hundred nine".