204112742520251 has 4 divisors (see below), whose sum is σ = 204112808719104. Its totient is φ = 204112676321400.

The previous prime is 204112742520221. The next prime is 204112742520287. The reversal of 204112742520251 is 152025247211402.

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

It is a cyclic number.

It is not a de Polignac number, because 204112742520251 - 2¹⁰ = 204112742519227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204112742520221) 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, 28236260 + ... + 34720481.

It is an arithmetic number, because the mean of its divisors is an integer number (51028202179776).

Almost surely, 2^{204112742520251} is an apocalyptic number.

204112742520251 is a deficient number, since it is larger than the sum of its proper divisors (66198853).

204112742520251 is an equidigital number, since it uses as much as digits as its factorization.

204112742520251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66198852.

The product of its (nonzero) digits is 89600, while the sum is 38.

Adding to 204112742520251 its reverse (152025247211402), we get a palindrome (356137989731653).

The spelling of 204112742520251 in words is "two hundred four trillion, one hundred twelve billion, seven hundred forty-two million, five hundred twenty thousand, two hundred fifty-one".