204162251 has 4 divisors (see below), whose sum is σ = 204213312. Its totient is φ = 204111192.

The previous prime is 204162241. The next prime is 204162269. The reversal of 204162251 is 152261402.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204162251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204162221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18971 + ... + 27716.

It is an arithmetic number, because the mean of its divisors is an integer number (51053328).

Almost surely, 2^204162251 is an apocalyptic number.

204162251 is a deficient number, since it is larger than the sum of its proper divisors (51061).

204162251 is an equidigital number, since it uses as much as digits as its factorization.

204162251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 204162251 is about 14288.5356492539. The cubic root of 204162251 is about 588.8325579057.

The spelling of 204162251 in words is "two hundred four million, one hundred sixty-two thousand, two hundred fifty-one".