5123105520 has 80 divisors (see below), whose sum is σ = 17103301152. Its totient is φ = 1261071360.

The previous prime is 5123105503. The next prime is 5123105563. The reversal of 5123105520 is 255013215.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817891 + ... + 824130.

Almost surely, 2^5123105520 is an apocalyptic number.

It is an amenable number.

5123105520 is an abundant number, since it is smaller than the sum of its proper divisors (11980195632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5123105520 is a wasteful number, since it uses less digits than its factorization.

5123105520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642050 (or 1642044 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 5123105520 is about 71575.8724711058. The cubic root of 5123105520 is about 1723.8961524289.

Adding to 5123105520 its reverse (255013215), we get a palindrome (5378118735).

The spelling of 5123105520 in words is "five billion, one hundred twenty-three million, one hundred five thousand, five hundred twenty".