3131422321 has 8 divisors (see below), whose sum is σ = 3319638120. Its totient is φ = 2943652608.

The previous prime is 3131422249. The next prime is 3131422337. The reversal of 3131422321 is 1232241313.

It can be written as a sum of positive squares in 4 ways, for example, as 1673709921 + 1457712400 = 40911^2 + 38180^2 .

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 3131422321 - 2²⁵ = 3097867889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131422292 and 3131422301.

It is not an unprimeable number, because it can be changed into a prime (3131422421) 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, 97006 + ... + 125191.

It is an arithmetic number, because the mean of its divisors is an integer number (414954765).

Almost surely, 2^3131422321 is an apocalyptic number.

It is an amenable number.

3131422321 is a deficient number, since it is larger than the sum of its proper divisors (188215799).

3131422321 is a wasteful number, since it uses less digits than its factorization.

3131422321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223043.

The product of its digits is 864, while the sum is 22.

The square root of 3131422321 is about 55959.1129397170. The cubic root of 3131422321 is about 1463.0097294103.

Adding to 3131422321 its reverse (1232241313), we get a palindrome (4363663634).

It can be divided in two parts, 31314 and 22321, that added together give a palindrome (53635).

The spelling of 3131422321 in words is "three billion, one hundred thirty-one million, four hundred twenty-two thousand, three hundred twenty-one".