550012181 has 2 divisors, whose sum is σ = 550012182. Its totient is φ = 550012180.

The previous prime is 550012139. The next prime is 550012187. The reversal of 550012181 is 181210055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338891281 + 211120900 = 18409^2 + 14530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550012181 is a prime.

It is a super-2 number, since 2×550012181² = 605026798496753522, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550012187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275006090 + 275006091.

It is an arithmetic number, because the mean of its divisors is an integer number (275006091).

Almost surely, 2^550012181 is an apocalyptic number.

It is an amenable number.

550012181 is a deficient number, since it is larger than the sum of its proper divisors (1).

550012181 is an equidigital number, since it uses as much as digits as its factorization.

550012181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 550012181 is about 23452.3384974718. The cubic root of 550012181 is about 819.3273191332.

The spelling of 550012181 in words is "five hundred fifty million, twelve thousand, one hundred eighty-one".