2021231 has 8 divisors (see below), whose sum is σ = 2108544. Its totient is φ = 1935360.

The previous prime is 2021219. The next prime is 2021237. The reversal of 2021231 is 1321202.

It is a happy number.

2021231 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021231 - 2⁶ = 2021167 is a prime.

It is a super-2 number, since 2×2021231² = 8170749510722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (263568).

2^2021231 is an apocalyptic number.

2021231 is a deficient number, since it is larger than the sum of its proper divisors (87313).

2021231 is a wasteful number, since it uses less digits than its factorization.

2021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2021231 is about 1421.7000386861. The cubic root of 2021231 is about 126.4363597463.

Adding to 2021231 its reverse (1321202), we get a palindrome (3342433).

The spelling of 2021231 in words is "two million, twenty-one thousand, two hundred thirty-one".