2021471523 has 12 divisors (see below), whose sum is σ = 2936217960. Its totient is φ = 1340117856.

The previous prime is 2021471521. The next prime is 2021471537. The reversal of 2021471523 is 3251741202.

It is not a de Polignac number, because 2021471523 - 2¹ = 2021471521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2021471521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 625786 + ... + 629007.

It is an arithmetic number, because the mean of its divisors is an integer number (244684830).

Almost surely, 2^2021471523 is an apocalyptic number.

2021471523 is a deficient number, since it is larger than the sum of its proper divisors (914746437).

2021471523 is a wasteful number, since it uses less digits than its factorization.

2021471523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254978 (or 1254975 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 2021471523 is about 44960.7776067096. Note that the first 3 decimals coincide. The cubic root of 2021471523 is about 1264.4137478358.

The spelling of 2021471523 in words is "two billion, twenty-one million, four hundred seventy-one thousand, five hundred twenty-three".