505145111 has 2 divisors, whose sum is σ = 505145112. Its totient is φ = 505145110.

The previous prime is 505145099. The next prime is 505145129. The reversal of 505145111 is 111541505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505145111 - 2¹⁸ = 504882967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505145141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252572555 + 252572556.

It is an arithmetic number, because the mean of its divisors is an integer number (252572556).

Almost surely, 2^505145111 is an apocalyptic number.

505145111 is a deficient number, since it is larger than the sum of its proper divisors (1).

505145111 is an equidigital number, since it uses as much as digits as its factorization.

505145111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 505145111 is about 22475.4334997125. The cubic root of 505145111 is about 796.4136923329.

Adding to 505145111 its reverse (111541505), we get a palindrome (616686616).

The spelling of 505145111 in words is "five hundred five million, one hundred forty-five thousand, one hundred eleven".