204551032145 has 4 divisors (see below), whose sum is σ = 245461238580. Its totient is φ = 163640825712.

The previous prime is 204551032111. The next prime is 204551032159. The reversal of 204551032145 is 541230155402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541230155402 = 2 ⋅270615077701.

It can be written as a sum of positive squares in 2 ways, for example, as 79317146689 + 125233885456 = 281633^2 + 353884^2 .

It is a cyclic number.

It is not a de Polignac number, because 204551032145 - 2¹⁴ = 204551015761 is a prime.

It is a super-2 number, since 2×204551032145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20455103210 + ... + 20455103219.

It is an arithmetic number, because the mean of its divisors is an integer number (61365309645).

Almost surely, 2^204551032145 is an apocalyptic number.

It is an amenable number.

204551032145 is a deficient number, since it is larger than the sum of its proper divisors (40910206435).

204551032145 is an equidigital number, since it uses as much as digits as its factorization.

204551032145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40910206434.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 204551032145 its reverse (541230155402), we get a palindrome (745781187547).

The spelling of 204551032145 in words is "two hundred four billion, five hundred fifty-one million, thirty-two thousand, one hundred forty-five".