505000005481 has 2 divisors, whose sum is σ = 505000005482. Its totient is φ = 505000005480.

The previous prime is 505000005479. The next prime is 505000005511. The reversal of 505000005481 is 184500000505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348405687081 + 156594318400 = 590259^2 + 395720^2 .

It is a cyclic number.

It is not a de Polignac number, because 505000005481 - 2¹ = 505000005479 is a prime.

It is a super-2 number, since 2×505000005481² (a number of 24 digits) contains 22 as substring.

Together with 505000005479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505000005401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252500002740 + 252500002741.

It is an arithmetic number, because the mean of its divisors is an integer number (252500002741).

Almost surely, 2^505000005481 is an apocalyptic number.

It is an amenable number.

505000005481 is a deficient number, since it is larger than the sum of its proper divisors (1).

505000005481 is an equidigital number, since it uses as much as digits as its factorization.

505000005481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 505000005481 its reverse (184500000505), we get a palindrome (689500005986).

The spelling of 505000005481 in words is "five hundred five billion, five thousand, four hundred eighty-one".