204416251 has 4 divisors (see below), whose sum is σ = 220140592. Its totient is φ = 188691912.

The previous prime is 204416239. The next prime is 204416291. The reversal of 204416251 is 152614402.

It is a happy number.

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 204416251 - 2²⁷ = 70198523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204416291) 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, 7862151 + ... + 7862176.

It is an arithmetic number, because the mean of its divisors is an integer number (55035148).

Almost surely, 2^204416251 is an apocalyptic number.

204416251 is a deficient number, since it is larger than the sum of its proper divisors (15724341).

204416251 is a wasteful number, since it uses less digits than its factorization.

204416251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15724340.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 204416251 is about 14297.4211310991. The cubic root of 204416251 is about 589.0766472470.

The spelling of 204416251 in words is "two hundred four million, four hundred sixteen thousand, two hundred fifty-one".