2203131321 has 6 divisors (see below), whose sum is σ = 3182300810. Its totient is φ = 1468754208.

The previous prime is 2203131317. The next prime is 2203131353. The reversal of 2203131321 is 1231313022.

2203131321 is a `hidden beast` number, since 220 + 313 + 132 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1141088400 + 1062042921 = 33780^2 + 32589^2 .

It is not a de Polignac number, because 2203131321 - 2² = 2203131317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203131294 and 2203131303.

It is not an unprimeable number, because it can be changed into a prime (2205131321) 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, 122396176 + ... + 122396193.

Almost surely, 2^2203131321 is an apocalyptic number.

It is an amenable number.

2203131321 is a deficient number, since it is larger than the sum of its proper divisors (979169489).

2203131321 is a wasteful number, since it uses less digits than its factorization.

2203131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244792375 (or 244792372 counting only the distinct ones).

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

The square root of 2203131321 is about 46937.5257230289. The cubic root of 2203131321 is about 1301.2082102811.

Adding to 2203131321 its reverse (1231313022), we get a palindrome (3434444343).

The spelling of 2203131321 in words is "two billion, two hundred three million, one hundred thirty-one thousand, three hundred twenty-one".