56105613 has 12 divisors (see below), whose sum is σ = 85307040. Its totient is φ = 35435016.

The previous prime is 56105611. The next prime is 56105663. The reversal of 56105613 is 31650165.

It is a happy number.

It is not a de Polignac number, because 56105613 - 2¹ = 56105611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56105611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163881 + ... + 164222.

It is an arithmetic number, because the mean of its divisors is an integer number (7108920).

Almost surely, 2^56105613 is an apocalyptic number.

It is an amenable number.

56105613 is a deficient number, since it is larger than the sum of its proper divisors (29201427).

56105613 is a wasteful number, since it uses less digits than its factorization.

56105613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328128 (or 328125 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 56105613 is about 7490.3680149910. The cubic root of 56105613 is about 382.8265978970.

Adding to 56105613 its reverse (31650165), we get a palindrome (87755778).

The spelling of 56105613 in words is "fifty-six million, one hundred five thousand, six hundred thirteen".