1551128503 has 2 divisors, whose sum is σ = 1551128504. Its totient is φ = 1551128502.

The previous prime is 1551128489. The next prime is 1551128519. The reversal of 1551128503 is 3058211551.

It is a weak prime.

It is an emirp because it is prime and its reverse (3058211551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1551128503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551128543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775564251 + 775564252.

It is an arithmetic number, because the mean of its divisors is an integer number (775564252).

Almost surely, 2^1551128503 is an apocalyptic number.

1551128503 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551128503 is an equidigital number, since it uses as much as digits as its factorization.

1551128503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 31.

The square root of 1551128503 is about 39384.3687647777. The cubic root of 1551128503 is about 1157.5753215683.

The spelling of 1551128503 in words is "one billion, five hundred fifty-one million, one hundred twenty-eight thousand, five hundred three".