56113613 has 2 divisors, whose sum is σ = 56113614. Its totient is φ = 56113612.

The previous prime is 56113559. The next prime is 56113619. The reversal of 56113613 is 31631165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43059844 + 13053769 = 6562^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 56113613 - 2¹⁶ = 56048077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56113619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28056806 + 28056807.

It is an arithmetic number, because the mean of its divisors is an integer number (28056807).

Almost surely, 2^56113613 is an apocalyptic number.

It is an amenable number.

56113613 is a deficient number, since it is larger than the sum of its proper divisors (1).

56113613 is an equidigital number, since it uses as much as digits as its factorization.

56113613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 56113613 is about 7490.9020151114. The cubic root of 56113613 is about 382.8447925545.

Adding to 56113613 its reverse (31631165), we get a palindrome (87744778).

The spelling of 56113613 in words is "fifty-six million, one hundred thirteen thousand, six hundred thirteen".