205045453 has 8 divisors (see below), whose sum is σ = 212676120. Its totient is φ = 197524800.

The previous prime is 205045429. The next prime is 205045471. The reversal of 205045453 is 354540502.

It can be written as a sum of positive squares in 4 ways, for example, as 81324324 + 123721129 = 9018^2 + 11123^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205045453 - 2²¹ = 202948301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205045403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23698 + ... + 31171.

It is an arithmetic number, because the mean of its divisors is an integer number (26584515).

Almost surely, 2^205045453 is an apocalyptic number.

It is an amenable number.

205045453 is a deficient number, since it is larger than the sum of its proper divisors (7630667).

205045453 is a wasteful number, since it uses less digits than its factorization.

205045453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55007.

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 205045453 is about 14319.4082629137. The cubic root of 205045453 is about 589.6804292546.

Adding to 205045453 its reverse (354540502), we get a palindrome (559585955).

The spelling of 205045453 in words is "two hundred five million, forty-five thousand, four hundred fifty-three".