551664241 has 2 divisors, whose sum is σ = 551664242. Its totient is φ = 551664240.

The previous prime is 551664203. The next prime is 551664271. The reversal of 551664241 is 142466155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462078016 + 89586225 = 21496^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 551664241 - 2²³ = 543275633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551664197 and 551664206.

It is not a weakly prime, because it can be changed into another prime (551664271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275832120 + 275832121.

It is an arithmetic number, because the mean of its divisors is an integer number (275832121).

Almost surely, 2^551664241 is an apocalyptic number.

It is an amenable number.

551664241 is a deficient number, since it is larger than the sum of its proper divisors (1).

551664241 is an equidigital number, since it uses as much as digits as its factorization.

551664241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 34.

The square root of 551664241 is about 23487.5337360056. The cubic root of 551664241 is about 820.1468312317.

The spelling of 551664241 in words is "five hundred fifty-one million, six hundred sixty-four thousand, two hundred forty-one".