550529381 has 2 divisors, whose sum is σ = 550529382. Its totient is φ = 550529380.

The previous prime is 550529339. The next prime is 550529383. The reversal of 550529381 is 183925055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375390625 + 175138756 = 19375^2 + 13234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550529381 is a prime.

It is a super-2 number, since 2×550529381² = 606165198688486322, which contains 22 as substring.

Together with 550529383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550529383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275264690 + 275264691.

It is an arithmetic number, because the mean of its divisors is an integer number (275264691).

Almost surely, 2^550529381 is an apocalyptic number.

It is an amenable number.

550529381 is a deficient number, since it is larger than the sum of its proper divisors (1).

550529381 is an equidigital number, since it uses as much as digits as its factorization.

550529381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 550529381 is about 23463.3625254353. The cubic root of 550529381 is about 819.5840548614.

The spelling of 550529381 in words is "five hundred fifty million, five hundred twenty-nine thousand, three hundred eighty-one".