385553553 has 24 divisors (see below), whose sum is σ = 645779904. Its totient is φ = 200286240.

The previous prime is 385553533. The next prime is 385553569. The reversal of 385553553 is 355355583.

It is not a de Polignac number, because 385553553 - 2¹² = 385549457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (385553533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73326 + ... + 78407.

It is an arithmetic number, because the mean of its divisors is an integer number (26907496).

Almost surely, 2^385553553 is an apocalyptic number.

385553553 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

385553553 is a deficient number, since it is larger than the sum of its proper divisors (260226351).

385553553 is a wasteful number, since it uses less digits than its factorization.

385553553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151765 (or 151754 counting only the distinct ones).

The product of its digits is 675000, while the sum is 42.

The square root of 385553553 is about 19635.5176402355. The cubic root of 385553553 is about 727.8271241736.

The spelling of 385553553 in words is "three hundred eighty-five million, five hundred fifty-three thousand, five hundred fifty-three".