53305613 has 2 divisors, whose sum is σ = 53305614. Its totient is φ = 53305612.

The previous prime is 53305589. The next prime is 53305619. The reversal of 53305613 is 31650335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46267204 + 7038409 = 6802^2 + 2653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53305613 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 (53305619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26652806 + 26652807.

It is an arithmetic number, because the mean of its divisors is an integer number (26652807).

Almost surely, 2^53305613 is an apocalyptic number.

It is an amenable number.

53305613 is a deficient number, since it is larger than the sum of its proper divisors (1).

53305613 is an equidigital number, since it uses as much as digits as its factorization.

53305613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4050, while the sum is 26.

The square root of 53305613 is about 7301.0693052456. The cubic root of 53305613 is about 376.3491856696.

Adding to 53305613 its reverse (31650335), we get a palindrome (84955948).

The spelling of 53305613 in words is "fifty-three million, three hundred five thousand, six hundred thirteen".