551778023 has 2 divisors, whose sum is σ = 551778024. Its totient is φ = 551778022.

The previous prime is 551778013. The next prime is 551778037. The reversal of 551778023 is 320877155.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551778023 - 2⁸ = 551777767 is a prime.

It is a super-3 number, since 3×551778023³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551778013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275889011 + 275889012.

It is an arithmetic number, because the mean of its divisors is an integer number (275889012).

Almost surely, 2^551778023 is an apocalyptic number.

551778023 is a deficient number, since it is larger than the sum of its proper divisors (1).

551778023 is an equidigital number, since it uses as much as digits as its factorization.

551778023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 551778023 is about 23489.9557896561. The cubic root of 551778023 is about 820.2032130699.

The spelling of 551778023 in words is "five hundred fifty-one million, seven hundred seventy-eight thousand, twenty-three".