2021013523 has 2 divisors, whose sum is σ = 2021013524. Its totient is φ = 2021013522.

The previous prime is 2021013521. The next prime is 2021013551. The reversal of 2021013523 is 3253101202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021013523 - 2¹ = 2021013521 is a prime.

Together with 2021013521, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2021013523.

It is not a weakly prime, because it can be changed into another prime (2021013521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010506761 + 1010506762.

It is an arithmetic number, because the mean of its divisors is an integer number (1010506762).

Almost surely, 2^2021013523 is an apocalyptic number.

2021013523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021013523 is an equidigital number, since it uses as much as digits as its factorization.

2021013523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2021013523 is about 44955.6839899028. The cubic root of 2021013523 is about 1264.3182488836.

Adding to 2021013523 its reverse (3253101202), we get a palindrome (5274114725).

It can be divided in two parts, 20210 and 13523, that added together give a palindrome (33733).

The spelling of 2021013523 in words is "two billion, twenty-one million, thirteen thousand, five hundred twenty-three".