1525321328 has 40 divisors (see below), whose sum is σ = 3137031360. Its totient is φ = 715991040.

The previous prime is 1525321309. The next prime is 1525321351. The reversal of 1525321328 is 8231235251.

It is a junction number, because it is equal to n+sod(n) for n = 1525321294 and 1525321303.

It is a congruent number.

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, 104393 + ... + 118103.

It is an arithmetic number, because the mean of its divisors is an integer number (78425784).

Almost surely, 2^1525321328 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 1525321328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568515680).

1525321328 is an abundant number, since it is smaller than the sum of its proper divisors (1611710032).

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

1525321328 is a wasteful number, since it uses less digits than its factorization.

1525321328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14145 (or 14139 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 1525321328 is about 39055.3623462899. The cubic root of 1525321328 is about 1151.1195972347.

Adding to 1525321328 its reverse (8231235251), we get a palindrome (9756556579).

The spelling of 1525321328 in words is "one billion, five hundred twenty-five million, three hundred twenty-one thousand, three hundred twenty-eight".