1631128523 has 2 divisors, whose sum is σ = 1631128524. Its totient is φ = 1631128522.

The previous prime is 1631128501. The next prime is 1631128567. The reversal of 1631128523 is 3258211361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1631128523 - 2¹⁴ = 1631112139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1631128523.

It is not a weakly prime, because it can be changed into another prime (1631121523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815564261 + 815564262.

It is an arithmetic number, because the mean of its divisors is an integer number (815564262).

Almost surely, 2^1631128523 is an apocalyptic number.

1631128523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631128523 is an equidigital number, since it uses as much as digits as its factorization.

1631128523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 1631128523 is about 40387.2321780040. The cubic root of 1631128523 is about 1177.1434598632.

Adding to 1631128523 its reverse (3258211361), we get a palindrome (4889339884).

The spelling of 1631128523 in words is "one billion, six hundred thirty-one million, one hundred twenty-eight thousand, five hundred twenty-three".