505064381 has 2 divisors, whose sum is σ = 505064382. Its totient is φ = 505064380.

The previous prime is 505064239. The next prime is 505064419. The reversal of 505064381 is 183460505.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417548356 + 87516025 = 20434^2 + 9355^2 .

It is a cyclic number.

It is not a de Polignac number, because 505064381 - 2¹⁸ = 504802237 is a prime.

It is a super-2 number, since 2×505064381² = 510180057909826322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505024381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252532190 + 252532191.

It is an arithmetic number, because the mean of its divisors is an integer number (252532191).

Almost surely, 2^505064381 is an apocalyptic number.

It is an amenable number.

505064381 is a deficient number, since it is larger than the sum of its proper divisors (1).

505064381 is an equidigital number, since it uses as much as digits as its factorization.

505064381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 505064381 is about 22473.6374670412. The cubic root of 505064381 is about 796.3712636648.

The spelling of 505064381 in words is "five hundred five million, sixty-four thousand, three hundred eighty-one".