200242621 has 2 divisors, whose sum is σ = 200242622. Its totient is φ = 200242620.

The previous prime is 200242619. The next prime is 200242633. The reversal of 200242621 is 126242002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111619225 + 88623396 = 10565^2 + 9414^2 .

It is a cyclic number.

It is not a de Polignac number, because 200242621 - 2¹ = 200242619 is a prime.

Together with 200242619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200242421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100121310 + 100121311.

It is an arithmetic number, because the mean of its divisors is an integer number (100121311).

Almost surely, 2^200242621 is an apocalyptic number.

It is an amenable number.

200242621 is a deficient number, since it is larger than the sum of its proper divisors (1).

200242621 is an equidigital number, since it uses as much as digits as its factorization.

200242621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 200242621 is about 14150.7109715378. The cubic root of 200242621 is about 585.0399281194.

Adding to 200242621 its reverse (126242002), we get a palindrome (326484623).

The spelling of 200242621 in words is "two hundred million, two hundred forty-two thousand, six hundred twenty-one".