551668331 has 2 divisors, whose sum is σ = 551668332. Its totient is φ = 551668330.

The previous prime is 551668307. The next prime is 551668357. The reversal of 551668331 is 133866155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551668331 - 2⁶ = 551668267 is a prime.

It is a super-2 number, since 2×551668331² = 608675894856651122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551668531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275834165 + 275834166.

It is an arithmetic number, because the mean of its divisors is an integer number (275834166).

Almost surely, 2^551668331 is an apocalyptic number.

551668331 is a deficient number, since it is larger than the sum of its proper divisors (1).

551668331 is an equidigital number, since it uses as much as digits as its factorization.

551668331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 551668331 is about 23487.6208033083. The cubic root of 551668331 is about 820.1488580638.

The spelling of 551668331 in words is "five hundred fifty-one million, six hundred sixty-eight thousand, three hundred thirty-one".