1531103551 has 2 divisors, whose sum is σ = 1531103552. Its totient is φ = 1531103550.

The previous prime is 1531103501. The next prime is 1531103597. The reversal of 1531103551 is 1553011351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1531103551 - 2¹⁹ = 1530579263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531103501) 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, 765551775 + 765551776.

It is an arithmetic number, because the mean of its divisors is an integer number (765551776).

Almost surely, 2^1531103551 is an apocalyptic number.

1531103551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531103551 is an equidigital number, since it uses as much as digits as its factorization.

1531103551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 1531103551 is about 39129.3183048210. The cubic root of 1531103551 is about 1152.5723266031.

The spelling of 1531103551 in words is "one billion, five hundred thirty-one million, one hundred three thousand, five hundred fifty-one".