53155309 has 2 divisors, whose sum is σ = 53155310. Its totient is φ = 53155308.

The previous prime is 53155307. The next prime is 53155327. The reversal of 53155309 is 90355135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 22297284 = 5555^2 + 4722^2 .

It is a cyclic number.

It is not a de Polignac number, because 53155309 - 2¹ = 53155307 is a prime.

Together with 53155307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53155301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26577654 + 26577655.

It is an arithmetic number, because the mean of its divisors is an integer number (26577655).

Almost surely, 2^53155309 is an apocalyptic number.

It is an amenable number.

53155309 is a deficient number, since it is larger than the sum of its proper divisors (1).

53155309 is an equidigital number, since it uses as much as digits as its factorization.

53155309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125, while the sum is 31.

The square root of 53155309 is about 7290.7687523333. The cubic root of 53155309 is about 375.9951264081.

The spelling of 53155309 in words is "fifty-three million, one hundred fifty-five thousand, three hundred nine".