385553 has 4 divisors (see below), whose sum is σ = 440640. Its totient is φ = 330468.

The previous prime is 385537. The next prime is 385559. The reversal of 385553 is 355583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355583 = 73 ⋅4871.

It is a cyclic number.

It is not a de Polignac number, because 385553 - 2⁴ = 385537 is a prime.

It is a super-2 number, since 2×385553² = 297302231618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27533 + ... + 27546.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2³⁸⁵⁵⁵³ is an apocalyptic number.

It is an amenable number.

385553 is a deficient number, since it is larger than the sum of its proper divisors (55087).

385553 is an equidigital number, since it uses as much as digits as its factorization.

385553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55086.

The product of its digits is 9000, while the sum is 29.

The square root of 385553 is about 620.9291424953. The cubic root of 385553 is about 72.7826776199.

The spelling of 385553 in words is "three hundred eighty-five thousand, five hundred fifty-three".