4021564231 has 2 divisors, whose sum is σ = 4021564232. Its totient is φ = 4021564230.

The previous prime is 4021564229. The next prime is 4021564273. The reversal of 4021564231 is 1324651204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4021564231 - 2¹ = 4021564229 is a prime.

It is a super-2 number, since 2×4021564231² = 32345957728117242722, which contains 22 as substring.

Together with 4021564229, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4021564231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021564201) 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 as a sum of consecutive naturals, namely, 2010782115 + 2010782116.

It is an arithmetic number, because the mean of its divisors is an integer number (2010782116).

Almost surely, 2^4021564231 is an apocalyptic number.

4021564231 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021564231 is an equidigital number, since it uses as much as digits as its factorization.

4021564231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 4021564231 is about 63415.8042683368. The cubic root of 4021564231 is about 1590.2485313545.

The spelling of 4021564231 in words is "four billion, twenty-one million, five hundred sixty-four thousand, two hundred thirty-one".