551990443 has 2 divisors, whose sum is σ = 551990444. Its totient is φ = 551990442.

The previous prime is 551990407. The next prime is 551990447. The reversal of 551990443 is 344099155.

551990443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551990443 - 2⁹ = 551989931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551990396 and 551990405.

It is not a weakly prime, because it can be changed into another prime (551990447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275995221 + 275995222.

It is an arithmetic number, because the mean of its divisors is an integer number (275995222).

Almost surely, 2^551990443 is an apocalyptic number.

551990443 is a deficient number, since it is larger than the sum of its proper divisors (1).

551990443 is an equidigital number, since it uses as much as digits as its factorization.

551990443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 551990443 is about 23494.4768615945. The cubic root of 551990443 is about 820.3084517748.

The spelling of 551990443 in words is "five hundred fifty-one million, nine hundred ninety thousand, four hundred forty-three".