1631144200523 has 4 divisors (see below), whose sum is σ = 1631229839448. Its totient is φ = 1631058561600.

The previous prime is 1631144200493. The next prime is 1631144200549. The reversal of 1631144200523 is 3250024411361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1631144200523 - 2¹⁴ = 1631144184139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1631144200523.

It is not an unprimeable number, because it can be changed into a prime (1631144200583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42790886 + ... + 42828987.

It is an arithmetic number, because the mean of its divisors is an integer number (407807459862).

Almost surely, 2^{1631144200523} is an apocalyptic number.

1631144200523 is a deficient number, since it is larger than the sum of its proper divisors (85638925).

1631144200523 is an equidigital number, since it uses as much as digits as its factorization.

1631144200523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85638924.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 1631144200523 its reverse (3250024411361), we get a palindrome (4881168611884).

The spelling of 1631144200523 in words is "one trillion, six hundred thirty-one billion, one hundred forty-four million, two hundred thousand, five hundred twenty-three".