205122469 has 2 divisors, whose sum is σ = 205122470. Its totient is φ = 205122468.

The previous prime is 205122431. The next prime is 205122553. The reversal of 205122469 is 964221502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141729025 + 63393444 = 11905^2 + 7962^2 .

It is a cyclic number.

It is not a de Polignac number, because 205122469 - 2¹³ = 205114277 is a prime.

It is a super-2 number, since 2×205122469² = 84150454577311922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205122469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205122569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102561234 + 102561235.

It is an arithmetic number, because the mean of its divisors is an integer number (102561235).

Almost surely, 2^205122469 is an apocalyptic number.

It is an amenable number.

205122469 is a deficient number, since it is larger than the sum of its proper divisors (1).

205122469 is an equidigital number, since it uses as much as digits as its factorization.

205122469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 205122469 is about 14322.0972277108. The cubic root of 205122469 is about 589.7542488922.

The spelling of 205122469 in words is "two hundred five million, one hundred twenty-two thousand, four hundred sixty-nine".