551849591 has 2 divisors, whose sum is σ = 551849592. Its totient is φ = 551849590.

The previous prime is 551849539. The next prime is 551849593. The reversal of 551849591 is 195948155.

It is a happy number.

551849591 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 a de Polignac number, because none of the positive numbers 2^k-551849591 is a prime.

Together with 551849593, 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 (551849593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275924795 + 275924796.

It is an arithmetic number, because the mean of its divisors is an integer number (275924796).

Almost surely, 2^551849591 is an apocalyptic number.

551849591 is a deficient number, since it is larger than the sum of its proper divisors (1).

551849591 is an equidigital number, since it uses as much as digits as its factorization.

551849591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 47.

The square root of 551849591 is about 23491.4791147769. The cubic root of 551849591 is about 820.2386728402.

The spelling of 551849591 in words is "five hundred fifty-one million, eight hundred forty-nine thousand, five hundred ninety-one".