2020311257 has 2 divisors, whose sum is σ = 2020311258. Its totient is φ = 2020311256.

The previous prime is 2020311253. The next prime is 2020311311. The reversal of 2020311257 is 7521130202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1579983001 + 440328256 = 39749^2 + 20984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020311257 - 2² = 2020311253 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020311253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010155628 + 1010155629.

It is an arithmetic number, because the mean of its divisors is an integer number (1010155629).

Almost surely, 2^2020311257 is an apocalyptic number.

It is an amenable number.

2020311257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020311257 is an equidigital number, since it uses as much as digits as its factorization.

2020311257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 2020311257 is about 44947.8726637869. The cubic root of 2020311257 is about 1264.1717892697.

Adding to 2020311257 its reverse (7521130202), we get a palindrome (9541441459).

The spelling of 2020311257 in words is "two billion, twenty million, three hundred eleven thousand, two hundred fifty-seven".