56102811 has 4 divisors (see below), whose sum is σ = 74803752. Its totient is φ = 37401872.

The previous prime is 56102803. The next prime is 56102833. The reversal of 56102811 is 11820165.

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 56102811 - 2³ = 56102803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56102861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9350466 + ... + 9350471.

It is an arithmetic number, because the mean of its divisors is an integer number (18700938).

Almost surely, 2^56102811 is an apocalyptic number.

56102811 is a deficient number, since it is larger than the sum of its proper divisors (18700941).

56102811 is a wasteful number, since it uses less digits than its factorization.

56102811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18700940.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 56102811 is about 7490.1809724465. The cubic root of 56102811 is about 382.8202248093.

Adding to 56102811 its reverse (11820165), we get a palindrome (67922976).

The spelling of 56102811 in words is "fifty-six million, one hundred two thousand, eight hundred eleven".