1550014021 has 2 divisors, whose sum is σ = 1550014022. Its totient is φ = 1550014020.

The previous prime is 1550014019. The next prime is 1550014099. The reversal of 1550014021 is 1204100551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096536996 + 453477025 = 33114^2 + 21295^2 .

It is an emirp because it is prime and its reverse (1204100551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1550014021 - 2¹ = 1550014019 is a prime.

Together with 1550014019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1550014021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550014721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775007010 + 775007011.

It is an arithmetic number, because the mean of its divisors is an integer number (775007011).

Almost surely, 2^1550014021 is an apocalyptic number.

It is an amenable number.

1550014021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550014021 is an equidigital number, since it uses as much as digits as its factorization.

1550014021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1550014021 is about 39370.2174365344. The cubic root of 1550014021 is about 1157.2980168065.

Adding to 1550014021 its reverse (1204100551), we get a palindrome (2754114572).

The spelling of 1550014021 in words is "one billion, five hundred fifty million, fourteen thousand, twenty-one".