1550540249 has 2 divisors, whose sum is σ = 1550540250. Its totient is φ = 1550540248.

The previous prime is 1550540161. The next prime is 1550540261. The reversal of 1550540249 is 9420450551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1549603225 + 937024 = 39365^2 + 968^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550540249 - 2¹⁶ = 1550474713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1550540279) 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, 775270124 + 775270125.

It is an arithmetic number, because the mean of its divisors is an integer number (775270125).

Almost surely, 2^1550540249 is an apocalyptic number.

It is an amenable number.

1550540249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550540249 is an equidigital number, since it uses as much as digits as its factorization.

1550540249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 1550540249 is about 39376.8999414631. The cubic root of 1550540249 is about 1157.4289691091.

The spelling of 1550540249 in words is "one billion, five hundred fifty million, five hundred forty thousand, two hundred forty-nine".