1551768241 has 2 divisors, whose sum is σ = 1551768242. Its totient is φ = 1551768240.

The previous prime is 1551768191. The next prime is 1551768269. The reversal of 1551768241 is 1428671551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1202078241 + 349690000 = 34671^2 + 18700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551768241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1551768194 and 1551768203.

It is not a weakly prime, because it can be changed into another prime (1551768341) 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, 775884120 + 775884121.

It is an arithmetic number, because the mean of its divisors is an integer number (775884121).

Almost surely, 2^1551768241 is an apocalyptic number.

It is an amenable number.

1551768241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551768241 is an equidigital number, since it uses as much as digits as its factorization.

1551768241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 1551768241 is about 39392.4896522167. The cubic root of 1551768241 is about 1157.7344408019.

The spelling of 1551768241 in words is "one billion, five hundred fifty-one million, seven hundred sixty-eight thousand, two hundred forty-one".