5221639 has 2 divisors, whose sum is σ = 5221640. Its totient is φ = 5221638.

The previous prime is 5221631. The next prime is 5221649. The reversal of 5221639 is 9361225.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5221639 - 2³ = 5221631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5221631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2610819 + 2610820.

It is an arithmetic number, because the mean of its divisors is an integer number (2610820).

Almost surely, 2^5221639 is an apocalyptic number.

5221639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5221639 is an equidigital number, since it uses as much as digits as its factorization.

5221639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 5221639 is about 2285.0905890139. The cubic root of 5221639 is about 173.4878032104.

It can be divided in two parts, 522 and 1639, that multiplied together give a palindrome (855558).

The spelling of 5221639 in words is "five million, two hundred twenty-one thousand, six hundred thirty-nine".