2021351 has 4 divisors (see below), whose sum is σ = 2140272. Its totient is φ = 1902432.

The previous prime is 2021339. The next prime is 2021377. The reversal of 2021351 is 1531202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59435 + ... + 59468.

It is an arithmetic number, because the mean of its divisors is an integer number (535068).

2^2021351 is an apocalyptic number.

2021351 is a deficient number, since it is larger than the sum of its proper divisors (118921).

2021351 is a wasteful number, since it uses less digits than its factorization.

2021351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118920.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 2021351 is about 1421.7422410550. The cubic root of 2021351 is about 126.4388618623.

Adding to 2021351 its reverse (1531202), we get a palindrome (3552553).

The spelling of 2021351 in words is "two million, twenty-one thousand, three hundred fifty-one".