3521534520 has 128 divisors (see below), whose sum is σ = 12127219200. Its totient is φ = 801363456.

The previous prime is 3521534503. The next prime is 3521534563. The reversal of 3521534520 is 254351253.

3521534520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183207 + ... + 201513.

It is an arithmetic number, because the mean of its divisors is an integer number (94743900).

Almost surely, 2^3521534520 is an apocalyptic number.

3521534520 is a gapful number since it is divisible by the number (30) 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 3521534520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6063609600).

3521534520 is an abundant number, since it is smaller than the sum of its proper divisors (8605684680).

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

3521534520 is a wasteful number, since it uses less digits than its factorization.

3521534520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18557 (or 18553 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 3521534520 is about 59342.5186523120. The cubic root of 3521534520 is about 1521.4020016835.

Adding to 3521534520 its reverse (254351253), we get a palindrome (3775885773).

The spelling of 3521534520 in words is "three billion, five hundred twenty-one million, five hundred thirty-four thousand, five hundred twenty".