2153546309 has 2 divisors, whose sum is σ = 2153546310. Its totient is φ = 2153546308.

The previous prime is 2153546273. The next prime is 2153546323. The reversal of 2153546309 is 9036453512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202008900 + 951537409 = 34670^2 + 30847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153546309 - 2⁸ = 2153546053 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 (2153546389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076773154 + 1076773155.

It is an arithmetic number, because the mean of its divisors is an integer number (1076773155).

Almost surely, 2^2153546309 is an apocalyptic number.

It is an amenable number.

2153546309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153546309 is an equidigital number, since it uses as much as digits as its factorization.

2153546309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 2153546309 is about 46406.3175548330. The cubic root of 2153546309 is about 1291.3721171297.

The spelling of 2153546309 in words is "two billion, one hundred fifty-three million, five hundred forty-six thousand, three hundred nine".