53145613 has 2 divisors, whose sum is σ = 53145614. Its totient is φ = 53145612.

The previous prime is 53145601. The next prime is 53145619. The reversal of 53145613 is 31654135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28761769 + 24383844 = 5363^2 + 4938^2 .

It is a cyclic number.

It is not a de Polignac number, because 53145613 - 2⁵ = 53145581 is a prime.

It is a super-2 number, since 2×53145613² = 5648912362291538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53145619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26572806 + 26572807.

It is an arithmetic number, because the mean of its divisors is an integer number (26572807).

Almost surely, 2^53145613 is an apocalyptic number.

It is an amenable number.

53145613 is a deficient number, since it is larger than the sum of its proper divisors (1).

53145613 is an equidigital number, since it uses as much as digits as its factorization.

53145613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 53145613 is about 7290.1037715522. The cubic root of 53145613 is about 375.9722634022.

Adding to 53145613 its reverse (31654135), we get a palindrome (84799748).

The spelling of 53145613 in words is "fifty-three million, one hundred forty-five thousand, six hundred thirteen".