204115510523 has 4 divisors (see below), whose sum is σ = 204124986720. Its totient is φ = 204106034328.

The previous prime is 204115510507. The next prime is 204115510561. The reversal of 204115510523 is 325015511402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325015511402 = 2 ⋅162507755701.

It is a cyclic number.

It is not a de Polignac number, because 204115510523 - 2⁴ = 204115510507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204115710523) 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, 4705715 + ... + 4748892.

It is an arithmetic number, because the mean of its divisors is an integer number (51031246680).

Almost surely, 2^204115510523 is an apocalyptic number.

204115510523 is a deficient number, since it is larger than the sum of its proper divisors (9476197).

204115510523 is an equidigital number, since it uses as much as digits as its factorization.

204115510523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476196.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 204115510523 in words is "two hundred four billion, one hundred fifteen million, five hundred ten thousand, five hundred twenty-three".