385006553 has 4 divisors (see below), whose sum is σ = 385156068. Its totient is φ = 384857040.

The previous prime is 385006529. The next prime is 385006603. The reversal of 385006553 is 355600583.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 230948809 + 154057744 = 15197^2 + 12412^2 .

It is a cyclic number.

It is not a de Polignac number, because 385006553 - 2¹⁶ = 384941017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385005553) 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 in 3 ways as a sum of consecutive naturals, for example, 70826 + ... + 76067.

It is an arithmetic number, because the mean of its divisors is an integer number (96289017).

Almost surely, 2^385006553 is an apocalyptic number.

It is an amenable number.

385006553 is a deficient number, since it is larger than the sum of its proper divisors (149515).

385006553 is a wasteful number, since it uses less digits than its factorization.

385006553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149514.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 385006553 is about 19621.5838555403. The cubic root of 385006553 is about 727.4827622735.

The spelling of 385006553 in words is "three hundred eighty-five million, six thousand, five hundred fifty-three".