550342381 has 2 divisors, whose sum is σ = 550342382. Its totient is φ = 550342380.

The previous prime is 550342379. The next prime is 550342393. The reversal of 550342381 is 183243055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513022500 + 37319881 = 22650^2 + 6109^2 .

It is a cyclic number.

It is not a de Polignac number, because 550342381 - 2¹ = 550342379 is a prime.

It is a super-2 number, since 2×550342381² = 605753472649498322, which contains 22 as substring.

Together with 550342379, 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 (550345381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275171190 + 275171191.

It is an arithmetic number, because the mean of its divisors is an integer number (275171191).

Almost surely, 2^550342381 is an apocalyptic number.

It is an amenable number.

550342381 is a deficient number, since it is larger than the sum of its proper divisors (1).

550342381 is an equidigital number, since it uses as much as digits as its factorization.

550342381 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 31.

The square root of 550342381 is about 23459.3772508991. The cubic root of 550342381 is about 819.4912474777.

The spelling of 550342381 in words is "five hundred fifty million, three hundred forty-two thousand, three hundred eighty-one".