551688499 has 2 divisors, whose sum is σ = 551688500. Its totient is φ = 551688498.

The previous prime is 551688481. The next prime is 551688569. The reversal of 551688499 is 994886155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551688499 - 2⁹ = 551687987 is a prime.

It is not a weakly prime, because it can be changed into another prime (551688439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275844249 + 275844250.

It is an arithmetic number, because the mean of its divisors is an integer number (275844250).

Almost surely, 2^551688499 is an apocalyptic number.

551688499 is a deficient number, since it is larger than the sum of its proper divisors (1).

551688499 is an equidigital number, since it uses as much as digits as its factorization.

551688499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 55.

The square root of 551688499 is about 23488.0501319288. The cubic root of 551688499 is about 820.1588523301.

The spelling of 551688499 in words is "five hundred fifty-one million, six hundred eighty-eight thousand, four hundred ninety-nine".