3215643123213 has 12 divisors (see below), whose sum is σ = 4687430853820. Its totient is φ = 2124094539456.

The previous prime is 3215643123211. The next prime is 3215643123223. The reversal of 3215643123213 is 3123213465123.

3215643123213 is a `hidden beast` number, since 3 + 2 + 1 + 5 + 6 + 431 + 2 + 3 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2749484636649 + 466158486564 = 1658157^2 + 682758^2 .

It is not a de Polignac number, because 3215643123213 - 2¹ = 3215643123211 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 (3215643123211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1638960856 + ... + 1638962817.

Almost surely, 2^{3215643123213} is an apocalyptic number.

It is an amenable number.

3215643123213 is a deficient number, since it is larger than the sum of its proper divisors (1471787730607).

3215643123213 is a wasteful number, since it uses less digits than its factorization.

3215643123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277923788 (or 3277923785 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 3215643123213 its reverse (3123213465123), we get a palindrome (6338856588336).

The spelling of 3215643123213 in words is "three trillion, two hundred fifteen billion, six hundred forty-three million, one hundred twenty-three thousand, two hundred thirteen".