550750381 has 2 divisors, whose sum is σ = 550750382. Its totient is φ = 550750380.

The previous prime is 550750367. The next prime is 550750393. The reversal of 550750381 is 183057055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533194281 + 17556100 = 23091^2 + 4190^2 .

It is a cyclic number.

It is not a de Polignac number, because 550750381 - 2²¹ = 548653229 is a prime.

It is a super-2 number, since 2×550750381² = 606651964343290322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550750181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275375190 + 275375191.

It is an arithmetic number, because the mean of its divisors is an integer number (275375191).

Almost surely, 2^550750381 is an apocalyptic number.

It is an amenable number.

550750381 is a deficient number, since it is larger than the sum of its proper divisors (1).

550750381 is an equidigital number, since it uses as much as digits as its factorization.

550750381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 550750381 is about 23468.0715228158. The cubic root of 550750381 is about 819.6937092238.

The spelling of 550750381 in words is "five hundred fifty million, seven hundred fifty thousand, three hundred eighty-one".