5125221520 has 40 divisors (see below), whose sum is σ = 11968218360. Its totient is φ = 2041128960.

The previous prime is 5125221461. The next prime is 5125221527. The reversal of 5125221520 is 251225215.

It can be written as a sum of positive squares in 4 ways, for example, as 1380271104 + 3744950416 = 37152^2 + 61196^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×5125221520² = 52535791258142220800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5125221527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121561 + ... + 158200.

It is an arithmetic number, because the mean of its divisors is an integer number (299205459).

Almost surely, 2^5125221520 is an apocalyptic number.

It is an amenable number.

5125221520 is an abundant number, since it is smaller than the sum of its proper divisors (6842996840).

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

5125221520 is a wasteful number, since it uses less digits than its factorization.

5125221520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280003 (or 279997 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 5125221520 is about 71590.6524624549. The cubic root of 5125221520 is about 1724.1334604541.

Adding to 5125221520 its reverse (251225215), we get a palindrome (5376446735).

The spelling of 5125221520 in words is "five billion, one hundred twenty-five million, two hundred twenty-one thousand, five hundred twenty".