2021355 has 80 divisors (see below), whose sum is σ = 4460544. Its totient is φ = 855360.

The previous prime is 2021339. The next prime is 2021377. The reversal of 2021355 is 5531202.

It is a happy number.

It is not a de Polignac number, because 2021355 - 2⁴ = 2021339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 65190 + ... + 65220.

2^2021355 is an apocalyptic number.

2021355 is an abundant number, since it is smaller than the sum of its proper divisors (2439189).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021355 is a wasteful number, since it uses less digits than its factorization.

2021355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 69 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2021355 is about 1421.7436477790. The cubic root of 2021355 is about 126.4389452644.

Subtracting from 2021355 its product of nonzero digits (300), we obtain a triangular number (2021055 = T₂₀₁₀).

Adding to 2021355 its reverse (5531202), we get a palindrome (7552557).

The spelling of 2021355 in words is "two million, twenty-one thousand, three hundred fifty-five".