551551379 has 2 divisors, whose sum is σ = 551551380. Its totient is φ = 551551378.

The previous prime is 551551333. The next prime is 551551397. The reversal of 551551379 is 973155155.

Together with next prime (551551397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551551379 - 2²⁰ = 550502803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551551279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275775689 + 275775690.

It is an arithmetic number, because the mean of its divisors is an integer number (275775690).

Almost surely, 2^551551379 is an apocalyptic number.

551551379 is a deficient number, since it is larger than the sum of its proper divisors (1).

551551379 is an equidigital number, since it uses as much as digits as its factorization.

551551379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118125, while the sum is 41.

The square root of 551551379 is about 23485.1310194344. The cubic root of 551551379 is about 820.0908976174.

The spelling of 551551379 in words is "five hundred fifty-one million, five hundred fifty-one thousand, three hundred seventy-nine".