3505424221 has 8 divisors (see below), whose sum is σ = 3817490040. Its totient is φ = 3199418112.

The previous prime is 3505424183. The next prime is 3505424249. The reversal of 3505424221 is 1224245053.

3505424221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 356643225 + 3148780996 = 18885^2 + 56114^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3505424221 - 2⁷ = 3505424093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3505424221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505424281) 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, 1513720 + ... + 1516033.

It is an arithmetic number, because the mean of its divisors is an integer number (477186255).

Almost surely, 2^3505424221 is an apocalyptic number.

It is an amenable number.

3505424221 is a deficient number, since it is larger than the sum of its proper divisors (312065819).

3505424221 is a wasteful number, since it uses less digits than its factorization.

3505424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029855.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 3505424221 is about 59206.6231176884. The cubic root of 3505424221 is about 1519.0784206105.

Adding to 3505424221 its reverse (1224245053), we get a palindrome (4729669274).

The spelling of 3505424221 in words is "three billion, five hundred five million, four hundred twenty-four thousand, two hundred twenty-one".