553905 has 32 divisors (see below), whose sum is σ = 1077120. Its totient is φ = 267840.

The previous prime is 553901. The next prime is 553919. The reversal of 553905 is 509355.

553905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 553905 - 2² = 553901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (553901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1299 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (33660).

2⁵⁵³⁹⁰⁵ is an apocalyptic number.

553905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

553905 is a deficient number, since it is larger than the sum of its proper divisors (523215).

553905 is a wasteful number, since it uses less digits than its factorization.

553905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 3375, while the sum is 27.

The square root of 553905 is about 744.2479425568. The cubic root of 553905 is about 82.1255759848.

Subtracting from 553905 its sum of digits (27), we obtain a triangular number (553878 = T₁₀₅₂).

The spelling of 553905 in words is "five hundred fifty-three thousand, nine hundred five".