550030381 has 2 divisors, whose sum is σ = 550030382. Its totient is φ = 550030380.

The previous prime is 550030379. The next prime is 550030423. The reversal of 550030381 is 183030055.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358761481 + 191268900 = 18941^2 + 13830^2 .

It is a cyclic number.

It is not a de Polignac number, because 550030381 - 2¹ = 550030379 is a prime.

It is a super-2 number, since 2×550030381² = 605066840046010322, which contains 22 as substring.

Together with 550030379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550030081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275015190 + 275015191.

It is an arithmetic number, because the mean of its divisors is an integer number (275015191).

Almost surely, 2^550030381 is an apocalyptic number.

It is an amenable number.

550030381 is a deficient number, since it is larger than the sum of its proper divisors (1).

550030381 is an equidigital number, since it uses as much as digits as its factorization.

550030381 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 25.

The square root of 550030381 is about 23452.7265152690. The cubic root of 550030381 is about 819.3363562620.

The spelling of 550030381 in words is "five hundred fifty million, thirty thousand, three hundred eighty-one".