550232021 has 2 divisors, whose sum is σ = 550232022. Its totient is φ = 550232020.

The previous prime is 550231991. The next prime is 550232027. The reversal of 550232021 is 120232055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355322500 + 194909521 = 18850^2 + 13961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-550232021 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 550231984 and 550232002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550232027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275116010 + 275116011.

It is an arithmetic number, because the mean of its divisors is an integer number (275116011).

Almost surely, 2^550232021 is an apocalyptic number.

It is an amenable number.

550232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

550232021 is an equidigital number, since it uses as much as digits as its factorization.

550232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 550232021 is about 23457.0249818684. The cubic root of 550232021 is about 819.4364663674.

Adding to 550232021 its reverse (120232055), we get a palindrome (670464076).

The spelling of 550232021 in words is "five hundred fifty million, two hundred thirty-two thousand, twenty-one".