205241123 has 2 divisors, whose sum is σ = 205241124. Its totient is φ = 205241122.

The previous prime is 205241089. The next prime is 205241137. The reversal of 205241123 is 321142502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205241123 - 2¹⁴ = 205224739 is a prime.

It is a super-2 number, since 2×205241123² = 84247837140602258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205241095 and 205241104.

It is not a weakly prime, because it can be changed into another prime (204241123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102620561 + 102620562.

It is an arithmetic number, because the mean of its divisors is an integer number (102620562).

Almost surely, 2^205241123 is an apocalyptic number.

205241123 is a deficient number, since it is larger than the sum of its proper divisors (1).

205241123 is an equidigital number, since it uses as much as digits as its factorization.

205241123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 205241123 is about 14326.2389691084. The cubic root of 205241123 is about 589.8679422913.

Adding to 205241123 its reverse (321142502), we get a palindrome (526383625).

The spelling of 205241123 in words is "two hundred five million, two hundred forty-one thousand, one hundred twenty-three".