3215511431213 has 4 divisors (see below), whose sum is σ = 3215523967488. Its totient is φ = 3215498894940.

The previous prime is 3215511431179. The next prime is 3215511431257. The reversal of 3215511431213 is 3121341155123.

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 not a de Polignac number, because 3215511431213 - 2³⁰ = 3214437689389 is a prime.

It is a super-2 number, since 2×3215511431213² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3215511431213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3215511431513) 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, 5875181 + ... + 6399122.

It is an arithmetic number, because the mean of its divisors is an integer number (803880991872).

Almost surely, 2^{3215511431213} is an apocalyptic number.

It is an amenable number.

3215511431213 is a deficient number, since it is larger than the sum of its proper divisors (12536275).

3215511431213 is a wasteful number, since it uses less digits than its factorization.

3215511431213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12536274.

The product of its digits is 10800, while the sum is 32.

Adding to 3215511431213 its reverse (3121341155123), we get a palindrome (6336852586336).

The spelling of 3215511431213 in words is "three trillion, two hundred fifteen billion, five hundred eleven million, four hundred thirty-one thousand, two hundred thirteen".