3131223201 has 6 divisors (see below), whose sum is σ = 4522877970. Its totient is φ = 2087482128.

The previous prime is 3131223167. The next prime is 3131223211. The reversal of 3131223201 is 1023221313.

3131223201 is a `hidden beast` number, since 31 + 312 + 2 + 320 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2676510225 + 454712976 = 51735^2 + 21324^2 .

It is not a de Polignac number, because 3131223201 - 2²³ = 3122834593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3131223211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173956836 + ... + 173956853.

It is an arithmetic number, because the mean of its divisors is an integer number (753812995).

Almost surely, 2^3131223201 is an apocalyptic number.

It is an amenable number.

3131223201 is a deficient number, since it is larger than the sum of its proper divisors (1391654769).

3131223201 is a wasteful number, since it uses less digits than its factorization.

3131223201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347913695 (or 347913692 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 3131223201 is about 55957.3337552818. Note that the first 3 decimals coincide. The cubic root of 3131223201 is about 1462.9787189362.

Adding to 3131223201 its reverse (1023221313), we get a palindrome (4154444514).

The spelling of 3131223201 in words is "three billion, one hundred thirty-one million, two hundred twenty-three thousand, two hundred one".