551642317 has 2 divisors, whose sum is σ = 551642318. Its totient is φ = 551642316.

The previous prime is 551642309. The next prime is 551642323. The reversal of 551642317 is 713246155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366301321 + 185340996 = 19139^2 + 13614^2 .

It is a cyclic number.

It is not a de Polignac number, because 551642317 - 2³ = 551642309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551642017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275821158 + 275821159.

It is an arithmetic number, because the mean of its divisors is an integer number (275821159).

Almost surely, 2^551642317 is an apocalyptic number.

It is an amenable number.

551642317 is a deficient number, since it is larger than the sum of its proper divisors (1).

551642317 is an equidigital number, since it uses as much as digits as its factorization.

551642317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 551642317 is about 23487.0670157004. The cubic root of 551642317 is about 820.1359664484.

The spelling of 551642317 in words is "five hundred fifty-one million, six hundred forty-two thousand, three hundred seventeen".