205452553 has 4 divisors (see below), whose sum is σ = 206517268. Its totient is φ = 204387840.

The previous prime is 205452523. The next prime is 205452571. The reversal of 205452553 is 355254502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 190798969 = 3828^2 + 13813^2 .

It is a cyclic number.

It is not a de Polignac number, because 205452553 - 2⁵ = 205452521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205452523) 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, 532068 + ... + 532453.

It is an arithmetic number, because the mean of its divisors is an integer number (51629317).

Almost surely, 2^205452553 is an apocalyptic number.

It is an amenable number.

205452553 is a deficient number, since it is larger than the sum of its proper divisors (1064715).

205452553 is a wasteful number, since it uses less digits than its factorization.

205452553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064714.

The product of its (nonzero) digits is 30000, while the sum is 31.

The square root of 205452553 is about 14333.6161871316. The cubic root of 205452553 is about 590.0704244194.

The spelling of 205452553 in words is "two hundred five million, four hundred fifty-two thousand, five hundred fifty-three".