3505221412613 has 4 divisors (see below), whose sum is σ = 3507086886240. Its totient is φ = 3503355938988.

The previous prime is 3505221412547. The next prime is 3505221412619. The reversal of 3505221412613 is 3162141225053.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3505221412613 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 (3505221412619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932733995 + ... + 932737752.

It is an arithmetic number, because the mean of its divisors is an integer number (876771721560).

Almost surely, 2^{3505221412613} is an apocalyptic number.

It is an amenable number.

3505221412613 is a deficient number, since it is larger than the sum of its proper divisors (1865473627).

3505221412613 is a wasteful number, since it uses less digits than its factorization.

3505221412613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865473626.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 3505221412613 its reverse (3162141225053), we get a palindrome (6667362637666).

The spelling of 3505221412613 in words is "three trillion, five hundred five billion, two hundred twenty-one million, four hundred twelve thousand, six hundred thirteen".