205551113 has 4 divisors (see below), whose sum is σ = 205927440. Its totient is φ = 205174788.

The previous prime is 205551091. The next prime is 205551133. The reversal of 205551113 is 311155502.

It is a happy number.

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 not a de Polignac number, because 205551113 - 2¹⁴ = 205534729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205551133) 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, 187343 + ... + 188436.

It is an arithmetic number, because the mean of its divisors is an integer number (51481860).

Almost surely, 2^205551113 is an apocalyptic number.

It is an amenable number.

205551113 is a deficient number, since it is larger than the sum of its proper divisors (376327).

205551113 is an equidigital number, since it uses as much as digits as its factorization.

205551113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376326.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 205551113 is about 14337.0538465893. The cubic root of 205551113 is about 590.1647658182.

The spelling of 205551113 in words is "two hundred five million, five hundred fifty-one thousand, one hundred thirteen".