550900081 has 2 divisors, whose sum is σ = 550900082. Its totient is φ = 550900080.

The previous prime is 550900057. The next prime is 550900099. The reversal of 550900081 is 180009055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 353778481 + 197121600 = 18809^2 + 14040^2 .

It is a cyclic number.

It is not a de Polignac number, because 550900081 - 2⁷ = 550899953 is a prime.

It is a super-2 number, since 2×550900081² = 606981798491613122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (550100081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275450040 + 275450041.

It is an arithmetic number, because the mean of its divisors is an integer number (275450041).

Almost surely, 2^550900081 is an apocalyptic number.

It is an amenable number.

550900081 is a deficient number, since it is larger than the sum of its proper divisors (1).

550900081 is an equidigital number, since it uses as much as digits as its factorization.

550900081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 550900081 is about 23471.2607458568. The cubic root of 550900081 is about 819.7679697456.

The spelling of 550900081 in words is "five hundred fifty million, nine hundred thousand, eighty-one".