7228251520 has 128 divisors (see below), whose sum is σ = 19894455360. Its totient is φ = 2459959296.

The previous prime is 7228251509. The next prime is 7228251521. The reversal of 7228251520 is 251528227.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7228251521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 607872 + ... + 619648.

Almost surely, 2^7228251520 is an apocalyptic number.

7228251520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7228251520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9947227680).

7228251520 is an abundant number, since it is smaller than the sum of its proper divisors (12666203840).

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

7228251520 is a wasteful number, since it uses less digits than its factorization.

7228251520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11940 (or 11928 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 7228251520 is about 85019.1244367995. The cubic root of 7228251520 is about 1933.5010788525.

Adding to 7228251520 its reverse (251528227), we get a palindrome (7479779747).

The spelling of 7228251520 in words is "seven billion, two hundred twenty-eight million, two hundred fifty-one thousand, five hundred twenty".