2021315535 has 24 divisors (see below), whose sum is σ = 3508071840. Its totient is φ = 1076663232.

The previous prime is 2021315507. The next prime is 2021315557. The reversal of 2021315535 is 5355131202.

It is a happy number.

It is not a de Polignac number, because 2021315535 - 2⁵ = 2021315503 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021315499 and 2021315508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7686 + ... + 64044.

It is an arithmetic number, because the mean of its divisors is an integer number (146169660).

Almost surely, 2^2021315535 is an apocalyptic number.

2021315535 is a deficient number, since it is larger than the sum of its proper divisors (1486756305).

2021315535 is a wasteful number, since it uses less digits than its factorization.

2021315535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57167 (or 57164 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 2021315535 is about 44959.0428612532. The cubic root of 2021315535 is about 1264.3812239306.

Adding to 2021315535 its reverse (5355131202), we get a palindrome (7376446737).

The spelling of 2021315535 in words is "two billion, twenty-one million, three hundred fifteen thousand, five hundred thirty-five".