56105515 has 4 divisors (see below), whose sum is σ = 67326624. Its totient is φ = 44884408.

The previous prime is 56105501. The next prime is 56105521. The reversal of 56105515 is 51550165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56105515 - 2⁹ = 56105003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5610547 + ... + 5610556.

It is an arithmetic number, because the mean of its divisors is an integer number (16831656).

Almost surely, 2^56105515 is an apocalyptic number.

56105515 is a deficient number, since it is larger than the sum of its proper divisors (11221109).

56105515 is a wasteful number, since it uses less digits than its factorization.

56105515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221108.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 56105515 is about 7490.3614732535. The cubic root of 56105515 is about 382.8263750017.

The spelling of 56105515 in words is "fifty-six million, one hundred five thousand, five hundred fifteen".