2021313251 has 2 divisors, whose sum is σ = 2021313252. Its totient is φ = 2021313250.

The previous prime is 2021313223. The next prime is 2021313313. The reversal of 2021313251 is 1523131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021313251 - 2¹⁴ = 2021296867 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021313211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010656625 + 1010656626.

It is an arithmetic number, because the mean of its divisors is an integer number (1010656626).

Almost surely, 2^2021313251 is an apocalyptic number.

2021313251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021313251 is an equidigital number, since it uses as much as digits as its factorization.

2021313251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2021313251 is about 44959.0174603494. The cubic root of 2021313251 is about 1264.3807476982.

Adding to 2021313251 its reverse (1523131202), we get a palindrome (3544444453).

The spelling of 2021313251 in words is "two billion, twenty-one million, three hundred thirteen thousand, two hundred fifty-one".