2021432223 has 4 divisors (see below), whose sum is σ = 2695242968. Its totient is φ = 1347621480.

The previous prime is 2021432219. The next prime is 2021432239. The reversal of 2021432223 is 3222341202.

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

It is not a de Polignac number, because 2021432223 - 2² = 2021432219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021432223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021472223) 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, 336905368 + ... + 336905373.

It is an arithmetic number, because the mean of its divisors is an integer number (673810742).

Almost surely, 2^2021432223 is an apocalyptic number.

2021432223 is a deficient number, since it is larger than the sum of its proper divisors (673810745).

2021432223 is an equidigital number, since it uses as much as digits as its factorization.

2021432223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673810744.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 2021432223 is about 44960.3405569842. The cubic root of 2021432223 is about 1264.4055538409.

Adding to 2021432223 its reverse (3222341202), we get a palindrome (5243773425).

The spelling of 2021432223 in words is "two billion, twenty-one million, four hundred thirty-two thousand, two hundred twenty-three".