3505121521 has 8 divisors (see below), whose sum is σ = 3835325088. Its totient is φ = 3176844000.

The previous prime is 3505121513. The next prime is 3505121527. The reversal of 3505121521 is 1251215053.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3505121521 - 2³ = 3505121513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3505121527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477700 + ... + 484981.

It is an arithmetic number, because the mean of its divisors is an integer number (479415636).

Almost surely, 2^3505121521 is an apocalyptic number.

It is an amenable number.

3505121521 is a deficient number, since it is larger than the sum of its proper divisors (330203567).

3505121521 is a wasteful number, since it uses less digits than its factorization.

3505121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963023.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 3505121521 is about 59204.0667606542. The cubic root of 3505121521 is about 1519.0346942553.

Adding to 3505121521 its reverse (1251215053), we get a palindrome (4756336574).

The spelling of 3505121521 in words is "three billion, five hundred five million, one hundred twenty-one thousand, five hundred twenty-one".