205501433 has 2 divisors, whose sum is σ = 205501434. Its totient is φ = 205501432.

The previous prime is 205501409. The next prime is 205501451. The reversal of 205501433 is 334105502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120714169 + 84787264 = 10987^2 + 9208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205501433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205501399 and 205501408.

It is not a weakly prime, because it can be changed into another prime (205501133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102750716 + 102750717.

It is an arithmetic number, because the mean of its divisors is an integer number (102750717).

Almost surely, 2^205501433 is an apocalyptic number.

It is an amenable number.

205501433 is a deficient number, since it is larger than the sum of its proper divisors (1).

205501433 is an equidigital number, since it uses as much as digits as its factorization.

205501433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 205501433 is about 14335.3211683589. The cubic root of 205501433 is about 590.1172160101.

Adding to 205501433 its reverse (334105502), we get a palindrome (539606935).

The spelling of 205501433 in words is "two hundred five million, five hundred one thousand, four hundred thirty-three".