3505135621 has 8 divisors (see below), whose sum is σ = 3896528384. Its totient is φ = 3131138160.

The previous prime is 3505135609. The next prime is 3505135651. The reversal of 3505135621 is 1265315053.

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 3505135621 - 2⁷ = 3505135493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505135651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4348401 + ... + 4349206.

It is an arithmetic number, because the mean of its divisors is an integer number (487066048).

Almost surely, 2^3505135621 is an apocalyptic number.

3505135621 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3505135621 is a deficient number, since it is larger than the sum of its proper divisors (391392763).

3505135621 is a wasteful number, since it uses less digits than its factorization.

3505135621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697651.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 3505135621 is about 59204.1858401921. The cubic root of 3505135621 is about 1519.0367311186.

The spelling of 3505135621 in words is "three billion, five hundred five million, one hundred thirty-five thousand, six hundred twenty-one".