1521525325 has 24 divisors (see below), whose sum is σ = 2005907328. Its totient is φ = 1142306880.

The previous prime is 1521525323. The next prime is 1521525329. The reversal of 1521525325 is 5235251251.

It is not a de Polignac number, because 1521525325 - 2¹ = 1521525323 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521525323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5512 + ... + 55438.

It is an arithmetic number, because the mean of its divisors is an integer number (83579472).

Almost surely, 2^1521525325 is an apocalyptic number.

It is an amenable number.

1521525325 is a deficient number, since it is larger than the sum of its proper divisors (484382003).

1521525325 is a wasteful number, since it uses less digits than its factorization.

1521525325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50013 (or 50008 counting only the distinct ones).

The product of its digits is 15000, while the sum is 31.

The square root of 1521525325 is about 39006.7343544676. The cubic root of 1521525325 is about 1150.1638896860.

Adding to 1521525325 its reverse (5235251251), we get a palindrome (6756776576).

The spelling of 1521525325 in words is "one billion, five hundred twenty-one million, five hundred twenty-five thousand, three hundred twenty-five".