3131331213 has 8 divisors (see below), whose sum is σ = 4253884128. Its totient is φ = 2048166224.

The previous prime is 3131331211. The next prime is 3131331221. The reversal of 3131331213 is 3121331313.

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 3131331213 - 2¹ = 3131331211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3131331213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131331211) 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, 9846795 + ... + 9847112.

It is an arithmetic number, because the mean of its divisors is an integer number (531735516).

Almost surely, 2^3131331213 is an apocalyptic number.

It is an amenable number.

3131331213 is a deficient number, since it is larger than the sum of its proper divisors (1122552915).

3131331213 is a wasteful number, since it uses less digits than its factorization.

3131331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19693963.

The product of its digits is 486, while the sum is 21.

The square root of 3131331213 is about 55958.2988751445. The cubic root of 3131331213 is about 1462.9955406307.

Adding to 3131331213 its reverse (3121331313), we get a palindrome (6252662526).

It can be divided in two parts, 31313 and 31213, that added together give a palindrome (62526).

The spelling of 3131331213 in words is "three billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred thirteen".