2021161343 has 4 divisors (see below), whose sum is σ = 2086360128. Its totient is φ = 1955962560.

The previous prime is 2021161339. The next prime is 2021161357. The reversal of 2021161343 is 3431611202.

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

It is a cyclic number.

It is not a de Polignac number, because 2021161343 - 2² = 2021161339 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 (2021161333) 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, 32599346 + ... + 32599407.

It is an arithmetic number, because the mean of its divisors is an integer number (521590032).

Almost surely, 2^2021161343 is an apocalyptic number.

2021161343 is a deficient number, since it is larger than the sum of its proper divisors (65198785).

2021161343 is an equidigital number, since it uses as much as digits as its factorization.

2021161343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65198784.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2021161343 is about 44957.3280233601. The cubic root of 2021161343 is about 1264.3490728514.

Adding to 2021161343 its reverse (3431611202), we get a palindrome (5452772545).

The spelling of 2021161343 in words is "two billion, twenty-one million, one hundred sixty-one thousand, three hundred forty-three".