3131133321 has 32 divisors (see below), whose sum is σ = 4509388800. Its totient is φ = 1925464320.

The previous prime is 3131133319. The next prime is 3131133347. The reversal of 3131133321 is 1233311313.

It is not a de Polignac number, because 3131133321 - 2¹ = 3131133319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131133361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 557236 + ... + 562826.

It is an arithmetic number, because the mean of its divisors is an integer number (140918400).

Almost surely, 2^3131133321 is an apocalyptic number.

It is an amenable number.

3131133321 is a deficient number, since it is larger than the sum of its proper divisors (1378255479).

3131133321 is a wasteful number, since it uses less digits than its factorization.

3131133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5829.

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

The square root of 3131133321 is about 55956.5306376298. The cubic root of 3131133321 is about 1462.9647208086.

Adding to 3131133321 its reverse (1233311313), we get a palindrome (4364444634).

The spelling of 3131133321 in words is "three billion, one hundred thirty-one million, one hundred thirty-three thousand, three hundred twenty-one".