1550243197 has 2 divisors, whose sum is σ = 1550243198. Its totient is φ = 1550243196.

The previous prime is 1550243183. The next prime is 1550243213. The reversal of 1550243197 is 7913420551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1248491556 + 301751641 = 35334^2 + 17371^2 .

It is an emirp because it is prime and its reverse (7913420551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1550243197 - 2⁷ = 1550243069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550243297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775121598 + 775121599.

It is an arithmetic number, because the mean of its divisors is an integer number (775121599).

Almost surely, 2^1550243197 is an apocalyptic number.

It is an amenable number.

1550243197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550243197 is an equidigital number, since it uses as much as digits as its factorization.

1550243197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 1550243197 is about 39373.1278539056. The cubic root of 1550243197 is about 1157.3550510992.

The spelling of 1550243197 in words is "one billion, five hundred fifty million, two hundred forty-three thousand, one hundred ninety-seven".