4021572323 has 4 divisors (see below), whose sum is σ = 4030733520. Its totient is φ = 4012411128.

The previous prime is 4021572307. The next prime is 4021572329. The reversal of 4021572323 is 3232751204.

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 4021572323 - 2⁴ = 4021572307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021572329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4579940 + ... + 4580817.

It is an arithmetic number, because the mean of its divisors is an integer number (1007683380).

Almost surely, 2^4021572323 is an apocalyptic number.

4021572323 is a deficient number, since it is larger than the sum of its proper divisors (9161197).

4021572323 is an equidigital number, since it uses as much as digits as its factorization.

4021572323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161196.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 4021572323 is about 63415.8680694351. The cubic root of 4021572323 is about 1590.2495979613.

The spelling of 4021572323 in words is "four billion, twenty-one million, five hundred seventy-two thousand, three hundred twenty-three".