2021031313 has 12 divisors (see below), whose sum is σ = 2377416420. Its totient is φ = 1712844672.

The previous prime is 2021031307. The next prime is 2021031343. The reversal of 2021031313 is 3131301202.

It can be written as a sum of positive squares in 2 ways, for example, as 704212369 + 1316818944 = 26537^2 + 36288^2 .

It is not a de Polignac number, because 2021031313 - 2⁹ = 2021030801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021031343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227356 + ... + 236077.

It is an arithmetic number, because the mean of its divisors is an integer number (198118035).

Almost surely, 2^2021031313 is an apocalyptic number.

It is an amenable number.

2021031313 is a deficient number, since it is larger than the sum of its proper divisors (356385107).

2021031313 is an equidigital number, since it uses as much as digits as its factorization.

2021031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463536 (or 463529 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2021031313 is about 44955.8818509881. The cubic root of 2021031313 is about 1264.3219585991.

Adding to 2021031313 its reverse (3131301202), we get a palindrome (5152332515).

The spelling of 2021031313 in words is "two billion, twenty-one million, thirty-one thousand, three hundred thirteen".