56201111 has 2 divisors, whose sum is σ = 56201112. Its totient is φ = 56201110.

The previous prime is 56201087. The next prime is 56201137. The reversal of 56201111 is 11110265.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56201111 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56201111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56261111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28100555 + 28100556.

It is an arithmetic number, because the mean of its divisors is an integer number (28100556).

Almost surely, 2^56201111 is an apocalyptic number.

56201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

56201111 is an equidigital number, since it uses as much as digits as its factorization.

56201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 56201111 is about 7496.7400248375. The cubic root of 56201111 is about 383.0436792756.

Adding to 56201111 its reverse (11110265), we get a palindrome (67311376).

The spelling of 56201111 in words is "fifty-six million, two hundred one thousand, one hundred eleven".