56111213 has 2 divisors, whose sum is σ = 56111214. Its totient is φ = 56111212.

The previous prime is 56111189. The next prime is 56111233. The reversal of 56111213 is 31211165.

It is an a-pointer prime, because the next prime (56111233) can be obtained adding 56111213 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52736644 + 3374569 = 7262^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 56111213 - 2⁶ = 56111149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56111233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28055606 + 28055607.

It is an arithmetic number, because the mean of its divisors is an integer number (28055607).

Almost surely, 2^56111213 is an apocalyptic number.

It is an amenable number.

56111213 is a deficient number, since it is larger than the sum of its proper divisors (1).

56111213 is an equidigital number, since it uses as much as digits as its factorization.

56111213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 20.

The square root of 56111213 is about 7490.7418190724. The cubic root of 56111213 is about 382.8393343388.

Adding to 56111213 its reverse (31211165), we get a palindrome (87322378).

The spelling of 56111213 in words is "fifty-six million, one hundred eleven thousand, two hundred thirteen".