5590220021 has 2 divisors, whose sum is σ = 5590220022. Its totient is φ = 5590220020.

The previous prime is 5590220017. The next prime is 5590220047. The reversal of 5590220021 is 1200220955.

It is an a-pointer prime, because the next prime (5590220047) can be obtained adding 5590220021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5053788100 + 536431921 = 71090^2 + 23161^2 .

It is a cyclic number.

It is not a de Polignac number, because 5590220021 - 2² = 5590220017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5590220521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2795110010 + 2795110011.

It is an arithmetic number, because the mean of its divisors is an integer number (2795110011).

Almost surely, 2^5590220021 is an apocalyptic number.

It is an amenable number.

5590220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5590220021 is an equidigital number, since it uses as much as digits as its factorization.

5590220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 5590220021 is about 74767.7739470689. The cubic root of 5590220021 is about 1774.7736293740.

Adding to 5590220021 its reverse (1200220955), we get a palindrome (6790440976).

The spelling of 5590220021 in words is "five billion, five hundred ninety million, two hundred twenty thousand, twenty-one".