2020315521 has 24 divisors (see below), whose sum is σ = 3180335520. Its totient is φ = 1137229632.

The previous prime is 2020315501. The next prime is 2020315559. The reversal of 2020315521 is 1255130202.

It is not a de Polignac number, because 2020315521 - 2¹⁰ = 2020314497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2020315501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92716 + ... + 112413.

It is an arithmetic number, because the mean of its divisors is an integer number (132513980).

Almost surely, 2^2020315521 is an apocalyptic number.

2020315521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2020315521 is a deficient number, since it is larger than the sum of its proper divisors (1160019999).

2020315521 is a wasteful number, since it uses less digits than its factorization.

2020315521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205213 (or 205206 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2020315521 is about 44947.9200964850. The cubic root of 2020315521 is about 1264.1726786417.

Adding to 2020315521 its reverse (1255130202), we get a palindrome (3275445723).

The spelling of 2020315521 in words is "two billion, twenty million, three hundred fifteen thousand, five hundred twenty-one".