56112209 has 2 divisors, whose sum is σ = 56112210. Its totient is φ = 56112208.

The previous prime is 56112197. The next prime is 56112211. The reversal of 56112209 is 90221165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28654609 + 27457600 = 5353^2 + 5240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56112209 is a prime.

Together with 56112211, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3344651 and since 56112209 and 3344651 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (56112289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28056104 + 28056105.

It is an arithmetic number, because the mean of its divisors is an integer number (28056105).

Almost surely, 2^56112209 is an apocalyptic number.

It is an amenable number.

56112209 is a deficient number, since it is larger than the sum of its proper divisors (1).

56112209 is an equidigital number, since it uses as much as digits as its factorization.

56112209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 56112209 is about 7490.8083008444. The cubic root of 56112209 is about 382.8415995172.

The spelling of 56112209 in words is "fifty-six million, one hundred twelve thousand, two hundred nine".