2231021313 has 10 divisors (see below), whose sum is σ = 3332760354. Its totient is φ = 1487347488.

The previous prime is 2231021311. The next prime is 2231021323. The reversal of 2231021313 is 3131201322.

2231021313 is a `hidden beast` number, since 22 + 310 + 21 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1237069584 + 993951729 = 35172^2 + 31527^2 .

It is not a de Polignac number, because 2231021313 - 2¹ = 2231021311 is a prime.

It is a super-3 number, since 3×2231021313³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231021311) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13771656 + ... + 13771817.

Almost surely, 2^2231021313 is an apocalyptic number.

It is an amenable number.

2231021313 is a deficient number, since it is larger than the sum of its proper divisors (1101739041).

2231021313 is an equidigital number, since it uses as much as digits as its factorization.

2231021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27543485 (or 27543476 counting only the distinct ones).

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

The square root of 2231021313 is about 47233.6883272945. The cubic root of 2231021313 is about 1306.6759758798.

Adding to 2231021313 its reverse (3131201322), we get a palindrome (5362222635).

Subtracting 2231021313 from its reverse (3131201322), we obtain a square (900180009 = 30003²).

The spelling of 2231021313 in words is "two billion, two hundred thirty-one million, twenty-one thousand, three hundred thirteen".