505268381 has 2 divisors, whose sum is σ = 505268382. Its totient is φ = 505268380.

The previous prime is 505268369. The next prime is 505268431. The reversal of 505268381 is 183862505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489736900 + 15531481 = 22130^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 505268381 - 2⁶ = 505268317 is a prime.

It is a super-2 number, since 2×505268381² = 510592273676722322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505268081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252634190 + 252634191.

It is an arithmetic number, because the mean of its divisors is an integer number (252634191).

Almost surely, 2^505268381 is an apocalyptic number.

It is an amenable number.

505268381 is a deficient number, since it is larger than the sum of its proper divisors (1).

505268381 is an equidigital number, since it uses as much as digits as its factorization.

505268381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 505268381 is about 22478.1756599596. The cubic root of 505268381 is about 796.4784697134.

The spelling of 505268381 in words is "five hundred five million, two hundred sixty-eight thousand, three hundred eighty-one".