505400011 has 2 divisors, whose sum is σ = 505400012. Its totient is φ = 505400010.

The previous prime is 505399963. The next prime is 505400017. The reversal of 505400011 is 110004505.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505400011 - 2¹³ = 505391819 is a prime.

It is a super-2 number, since 2×505400011² = 510858342237600242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505400017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252700005 + 252700006.

It is an arithmetic number, because the mean of its divisors is an integer number (252700006).

Almost surely, 2^505400011 is an apocalyptic number.

505400011 is a deficient number, since it is larger than the sum of its proper divisors (1).

505400011 is an equidigital number, since it uses as much as digits as its factorization.

505400011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 505400011 is about 22481.1034204285. The cubic root of 505400011 is about 796.5476285750.

Adding to 505400011 its reverse (110004505), we get a palindrome (615404516).

The spelling of 505400011 in words is "five hundred five million, four hundred thousand, eleven".