3131223229 has 8 divisors (see below), whose sum is σ = 3172339800. Its totient is φ = 3090374976.

The previous prime is 3131223211. The next prime is 3131223239. The reversal of 3131223229 is 9223221313.

It can be written as a sum of positive squares in 4 ways, for example, as 301196025 + 2830027204 = 17355^2 + 53198^2 .

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 3131223229 - 2¹⁷ = 3131092157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131223197 and 3131223206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131223239) 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, 43534 + ... + 90319.

It is an arithmetic number, because the mean of its divisors is an integer number (396542475).

Almost surely, 2^3131223229 is an apocalyptic number.

It is an amenable number.

3131223229 is a deficient number, since it is larger than the sum of its proper divisors (41116571).

3131223229 is a wasteful number, since it uses less digits than its factorization.

3131223229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134159.

The product of its digits is 3888, while the sum is 28.

The square root of 3131223229 is about 55957.3340054724. The cubic root of 3131223229 is about 1462.9787232970.

The spelling of 3131223229 in words is "three billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred twenty-nine".