7225531520 has 64 divisors (see below), whose sum is σ = 17432177400. Its totient is φ = 2863669248.

The previous prime is 7225531519. The next prime is 7225531549. The reversal of 7225531520 is 251355227.

It can be written as a sum of positive squares in 4 ways, for example, as 7041223744 + 184307776 = 83912^2 + 13576^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17972 + ... + 121548.

Almost surely, 2^7225531520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7225531520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8716088700).

7225531520 is an abundant number, since it is smaller than the sum of its proper divisors (10206645880).

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

7225531520 is a wasteful number, since it uses less digits than its factorization.

7225531520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103705 (or 103693 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 7225531520 is about 85003.1265307342. The cubic root of 7225531520 is about 1933.2585221415.

Adding to 7225531520 its reverse (251355227), we get a palindrome (7476886747).

The spelling of 7225531520 in words is "seven billion, two hundred twenty-five million, five hundred thirty-one thousand, five hundred twenty".