4540221391 has 2 divisors, whose sum is σ = 4540221392. Its totient is φ = 4540221390.

The previous prime is 4540221377. The next prime is 4540221443. The reversal of 4540221391 is 1931220454.

4540221391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4540221391 - 2¹³ = 4540213199 is a prime.

It is a super-2 number, since 2×4540221391² = 41227220558587949762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4540321391) 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, 2270110695 + 2270110696.

It is an arithmetic number, because the mean of its divisors is an integer number (2270110696).

Almost surely, 2^4540221391 is an apocalyptic number.

4540221391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4540221391 is an equidigital number, since it uses as much as digits as its factorization.

4540221391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 4540221391 is about 67381.1649572787. The cubic root of 4540221391 is about 1655.8678606192.

The spelling of 4540221391 in words is "four billion, five hundred forty million, two hundred twenty-one thousand, three hundred ninety-one".