2153015509 has 2 divisors, whose sum is σ = 2153015510. Its totient is φ = 2153015508.

The previous prime is 2153015497. The next prime is 2153015569. The reversal of 2153015509 is 9055103512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1166427409 + 986588100 = 34153^2 + 31410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153015509 - 2²⁹ = 1616144597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2153015569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076507754 + 1076507755.

It is an arithmetic number, because the mean of its divisors is an integer number (1076507755).

Almost surely, 2^2153015509 is an apocalyptic number.

It is an amenable number.

2153015509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153015509 is an equidigital number, since it uses as much as digits as its factorization.

2153015509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 2153015509 is about 46400.5981534721. The cubic root of 2153015509 is about 1291.2660104966.

The spelling of 2153015509 in words is "two billion, one hundred fifty-three million, fifteen thousand, five hundred nine".