204155521322523 has 8 divisors (see below), whose sum is σ = 272235106921536. Its totient is φ = 136089808302600.

The previous prime is 204155521322443. The next prime is 204155521322531. The reversal of 204155521322523 is 325223125551402.

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

It is not a de Polignac number, because 204155521322523 - 2²² = 204155517128219 is a prime.

It is a super-2 number, since 2×204155521322523² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204155529322523) 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, 3468110433 + ... + 3468169298.

It is an arithmetic number, because the mean of its divisors is an integer number (34029388365192).

Almost surely, 2^{204155521322523} is an apocalyptic number.

204155521322523 is a deficient number, since it is larger than the sum of its proper divisors (68079585599013).

204155521322523 is an equidigital number, since it uses as much as digits as its factorization.

204155521322523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936289545.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 204155521322523 its reverse (325223125551402), we get a palindrome (529378646873925).

The spelling of 204155521322523 in words is "two hundred four trillion, one hundred fifty-five billion, five hundred twenty-one million, three hundred twenty-two thousand, five hundred twenty-three".