205553129 has 4 divisors (see below), whose sum is σ = 206914560. Its totient is φ = 204191700.

The previous prime is 205553111. The next prime is 205553143. The reversal of 205553129 is 921355502.

205553129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205553129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205553095 and 205553104.

It is not an unprimeable number, because it can be changed into a prime (205553429) 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, 680489 + ... + 680790.

It is an arithmetic number, because the mean of its divisors is an integer number (51728640).

Almost surely, 2^205553129 is an apocalyptic number.

It is an amenable number.

205553129 is a deficient number, since it is larger than the sum of its proper divisors (1361431).

205553129 is a wasteful number, since it uses less digits than its factorization.

205553129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361430.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 205553129 is about 14337.1241537485. The cubic root of 205553129 is about 590.1666952139.

The spelling of 205553129 in words is "two hundred five million, five hundred fifty-three thousand, one hundred twenty-nine".