523103581081 has 3 divisors (see below), whose sum is σ = 523104304341. Its totient is φ = 523102857822.

The previous prime is 523103580991. The next prime is 523103581111. The reversal of 523103581081 is 180185301325.

It is a happy number.

The square root of 523103581081 is 723259.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 523103581081 - 2¹⁹ = 523103056793 is a prime.

It is a super-2 number, since 2×523103581081² (a number of 24 digits) contains 22 as substring.

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 523103581081.

It is not an unprimeable number, because it can be changed into a prime (523103581681) 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 2 ways as a sum of consecutive naturals, for example, 361630 + ... + 1084888.

It is an arithmetic number, because the mean of its divisors is an integer number (174368101447).

Almost surely, 2^523103581081 is an apocalyptic number.

523103581081 is the 723259-th square number.

523103581081 is the 361630-th centered octagonal number.

It is an amenable number.

523103581081 is a deficient number, since it is larger than the sum of its proper divisors (723260).

523103581081 is an frugal number, since it uses more digits than its factorization.

523103581081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446518 (or 723259 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 523103581081 in words is "five hundred twenty-three billion, one hundred three million, five hundred eighty-one thousand, eighty-one".