1551224009 has 2 divisors, whose sum is σ = 1551224010. Its totient is φ = 1551224008.

The previous prime is 1551223957. The next prime is 1551224021. The reversal of 1551224009 is 9004221551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1432849609 + 118374400 = 37853^2 + 10880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551224009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1551224039) 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, 775612004 + 775612005.

It is an arithmetic number, because the mean of its divisors is an integer number (775612005).

Almost surely, 2^1551224009 is an apocalyptic number.

It is an amenable number.

1551224009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551224009 is an equidigital number, since it uses as much as digits as its factorization.

1551224009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1551224009 is about 39385.5812322225. The cubic root of 1551224009 is about 1157.5990791357.

The spelling of 1551224009 in words is "one billion, five hundred fifty-one million, two hundred twenty-four thousand, nine".