2021439271 has 4 divisors (see below), whose sum is σ = 2021556592. Its totient is φ = 2021321952.

The previous prime is 2021439269. The next prime is 2021439307. The reversal of 2021439271 is 1729341202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2021439271 - 2¹ = 2021439269 is a prime.

It is a super-2 number, since 2×2021439271² = 8172433452682022882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021419271) 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, 27186 + ... + 69151.

It is an arithmetic number, because the mean of its divisors is an integer number (505389148).

Almost surely, 2^2021439271 is an apocalyptic number.

2021439271 is a deficient number, since it is larger than the sum of its proper divisors (117321).

2021439271 is an equidigital number, since it uses as much as digits as its factorization.

2021439271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117320.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2021439271 is about 44960.4189371051. The cubic root of 2021439271 is about 1264.4070233468.

The spelling of 2021439271 in words is "two billion, twenty-one million, four hundred thirty-nine thousand, two hundred seventy-one".