3131213201 has 4 divisors (see below), whose sum is σ = 3239186100. Its totient is φ = 3023240304.

The previous prime is 3131213177. The next prime is 3131213207. The reversal of 3131213201 is 1023121313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1157632576 + 1973580625 = 34024^2 + 44425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131213201 is a prime.

It is a super-2 number, since 2×3131213201² = 19608992220233332802, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131213201.

It is not an unprimeable number, because it can be changed into a prime (3131213207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53986406 + ... + 53986463.

It is an arithmetic number, because the mean of its divisors is an integer number (809796525).

Almost surely, 2^3131213201 is an apocalyptic number.

It is an amenable number.

3131213201 is a deficient number, since it is larger than the sum of its proper divisors (107972899).

3131213201 is a wasteful number, since it uses less digits than its factorization.

3131213201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107972898.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 3131213201 is about 55957.2444014178. The cubic root of 3131213201 is about 1462.9771615254.

Adding to 3131213201 its reverse (1023121313), we get a palindrome (4154334514).

The spelling of 3131213201 in words is "three billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred one".