111855229 has 2 divisors, whose sum is σ = 111855230. Its totient is φ = 111855228.

The previous prime is 111855203. The next prime is 111855251. The reversal of 111855229 is 922558111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108722329 + 3132900 = 10427^2 + 1770^2 .

It is a cyclic number.

It is not a de Polignac number, because 111855229 - 2¹³ = 111847037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111855194 and 111855203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111850229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55927614 + 55927615.

It is an arithmetic number, because the mean of its divisors is an integer number (55927615).

Almost surely, 2^111855229 is an apocalyptic number.

It is an amenable number.

111855229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111855229 is an equidigital number, since it uses as much as digits as its factorization.

111855229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 34.

The square root of 111855229 is about 10576.1632457144. The cubic root of 111855229 is about 481.8206735785.

The spelling of 111855229 in words is "one hundred eleven million, eight hundred fifty-five thousand, two hundred twenty-nine".